Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0e21d2ec59ccd2…

MALICIOUS

PDF

87.5 KB Created: 2021-06-29 09:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3abd4531e7bb893be985f010fd26cd8 SHA-1: 39f42ad58fba3742a67fac5a9879aa048bc08b73 SHA-256: de0e21d2ec59ccd20e8f4689db75c7c1602b2af591be239c8a718e5bc82a25e2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress instances or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of numerous embedded URLs and the PDF structure itself are indicative of malicious activity, likely leading to a second-stage download or redirection to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b1b0edae8bebb16b70b0089a314290c7/sidutumumukipixu.pdf In PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/79638559155.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a729100f9d4---dadunifexipimozugorexon.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d668c394232---82936214024.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/khrpfp0vneigr19t0tr1ujs396/62654750773.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/65707126845.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/77536713841.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160832c157b3b4---13785374364.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/32901388266.pdfIn PDF document text
    • http://irths.com/upload_files/files/75361220355.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7def10786d---2824481453.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210527161829164.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c00bd4a8c83582c9ad3c5b7f154416f8/zosumu.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b403a5a2ea9---geviwufigikonojofad.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160982b63a823e---79516296899.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6c1a5c281b19bfc3a2f407e34fc45e07/70529492487.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/26072217079.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a70c6a5b50d---16336297010.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/gofivemukenobesedafaru.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/75558348545.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0c3f7364a---buzepijisenedawokeweke.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1cbe05fbe---56439697574.pdfPDF link annotation
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/28qntpvlb1915uj4bmgme7m120/nutes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=quicktime+screen+recording+1080pPDF 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_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 17664 bytes
SHA-256: 9b20f1fc93a626093e4d3f4e0b1969939b22776aa7852eeed17e2e0a78888e34
font_01_sfnt_off00011ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F8 11284 bytes
SHA-256: 879d08ed29a448dbc4dc09135e2ac5c7a0acc589c948c49a64a497cbd19b90c5

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