Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f39abea8d2646ce…

MALICIOUS

PDF

63.7 KB Created: 2021-06-11 02:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9423c53fa26633fffe32644328325199 SHA-1: bc53eb597ae9be15ee097221d9fcd7983cdfb168 SHA-256: 5f39abea8d2646cebb104ba88e01614a00d0a22558951a26fbb17caa630e2fe1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though truncated, suggests a lure related to movie downloads, and numerous URLs point to compromised WordPress sites hosting PDF files. These findings suggest the document is part of a phishing or malware distribution campaign, likely using embedded links to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://allytemp.ru/uplcv?utm_term=ready+player+one+movie+download+in+tamil
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a257dad70---87709387228.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b803819f093---fadofiga.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16ad5c2bd---37117717543.pdf
    • http://fresh-j.info/images/uploadedimages/file/92194009513.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b957c1ad6ef---49091508545.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce1751dd6b---95349804520.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e61cd9e2---sulamo.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/a78mskhu4gm97pvfpduj5ktpji/46638002679.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6943af7e1---zodesivibudiwufefok.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/46583414496.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/hp2k23bcadsrcq322gd4koct56/tabefasiligenexu.pdf
    • http://allaboutdowney.com/userimages/zuwugulatatomobof.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/7af4a360838a9fb783bf4c78a489dc45/lidanototokonob.pdf
    • http://visit-pune.com/userfiles/file/sekowovilijopaxima.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160717c902d72d---67475402002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b7.bin
820aa08a33af0847ff52178564a5d1b61cd4feb3a3e2be9e832cc6004b50dc4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 5188 bytes

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