Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebafcc88b86b6ab7…

MALICIOUS

PDF

68.7 KB Created: 2021-09-06 14:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 776ee63e515eb28cc64564c3157be383 SHA-1: 474d654a4aaec785ebe095f21da0e81233c417aa SHA-256: ebafcc88b86b6ab7bdce18fcbd57b8d7e8a9a05d6756b5646a25dededf8e949f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=the+harlem+hellfighters+pdf PDF link annotation
    • http://verynailscm.com/user_img/file/8287046177.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/vuluritowijejerome.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/kiwepuwomixerereku.pdfIn PDF document text
    • http://industrialdevices.in/uploads/57497025059.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/14/file/20210514_082239_178.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/setubejadopakujolopizum.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0363141001630175560.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zokupirurasonub.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/dajafowabipaxe.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160972d3bb9953---78705234788.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/222c34fb4f9d1927717136d3a5f24056/midotika.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/92540687939.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/db540577071e3247e991c908624a519f/dolexowanowawosu.pdfIn PDF document text
    • http://zl369.net/userfiles/file/81267611723.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/fac2f77a5f1497f7cebc3cb3a54cb1b6/dumigaxibuvurumarupow.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/rakuwowomosexiro.pdfIn PDF document text
    • https://digireg.pl/upload/12452534794.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/81923972345.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/74652590700.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/runum.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d479c274---5683497808.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05e5ba25e3---9192780384.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff39404fa7---wekajoseledizanukup.pdfIn PDF document text
    • 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_off0000b048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85F 10684 bytes
SHA-256: 4af5ef7d01082d7c3192419f0ce64e5959d70862875d15f1ae2d5674079343ad
font_02_sfnt_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 14704 bytes
SHA-256: 70dbb0fdb59329cabc18390d771c825fc5cdf87d885acf86b78422b570e08df0

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