Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a42ee2fa40903bb…

MALICIOUS

PDF

87.0 KB Created: 2021-07-02 09:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1911debf9eba45bd67171a496e44d47d SHA-1: 2572e2b7ae53559e33f9ad958f4fe50b47eb617e SHA-256: 9a42ee2fa40903bb52055e3a84f8c884531c79add7ee9f1ff436eb8bafcb87d8
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It exhibits characteristics of a ClickFix social engineering attack, instructing the user to execute commands via Win+R or a terminal. The document also contains numerous links to potentially compromised WordPress sites, suggesting a link farm or distribution point for further malicious content. No scripts were extracted, but the social engineering lure is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb9727adcd---50989443570.pdf In PDF document text
    • https://activepymes.com/pub/file/86654245458.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf1f05735---sefekagiduzel.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/33314919472.pdfIn PDF document text
    • https://ortechindustries.ca/ci/userfiles/files/kewezopilep.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/08543eba023c52a33153f8fa1701140c/soribiwefud.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/pagoxiwipovobixujisigemow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa08649d5bb---bunodupuxumazitaralulup.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee55d5c86f---55151619795.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afbba9e9794---40293539772.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d17c2982a4---rixaniz.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/juxivanezugadisu.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e926190169---53734542320.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/de4b6b5a07ca0b2865c62763943771e6/56689735275.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c1045fdec---5964697865.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/botifagabemufex.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/61613b767a0ac70c46db0d2d94ea4b06/94001074056.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ucijl8gph6gd42gbq0tadsjlbm/wevar.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/nabukesimodavojogukebuti.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb0fee9c25f9a5cc39cc61971ae9f906/wivipatas.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/78829160433.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceccf6309c---35202947378.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f566fbd8c1---gubaxegugufalabuwanusuze.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/ganikudufepapobidixagi.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/17fc273d79b543c10da65d4bb0573c21/berar.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/2976845200.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3f22a4c43---46422260740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=output+to+file+linuxPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 18440 bytes
SHA-256: 7f3f1c10281a031d0e92d0b359284068cc9f05f7fefccf7e26295b7b244cfc90
font_02_sfnt_off0001380d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380D 10148 bytes
SHA-256: 6058bc6264d40ba2f58cf32f3317c96fee2572ec53167fa40b9e6964e9533c2d

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