Malicious PDF — malware analysis report

Static analysis result for SHA-256 047bd80ab1a1ef61…

MALICIOUS

PDF

98.7 KB Created: 2021-07-02 11:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 091e2f840121288ab64f61ed0d32925a SHA-1: 3cc1a67c0281e4c2509db3511c227769cfdfc254 SHA-256: 047bd80ab1a1ef617c12e5aeef7124b3c8650b218f1c65178673e4e578e22686
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607700125dacc---fulogemegibobodovanisojog.pdf In PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/390919267.pdfIn PDF document text
    • https://memoservicesrl.it/file/93471289426.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/76fbu4j1gevif9rl682j2ks79s/78217317805.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/52e0d21085bece59bac514e37348a5f1/88550345692.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/7cf10aa218de322064a9d50742838d2b/limadag.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbd8feafcd---powimegatesi.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd83e28757b2d46c35ed574f206dd9f0/xusininiwebope.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4135b19d72db9ba4dcf2d0385e6ab3cb/vogasojazu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b8ca813f4c5ea50c9e383687071958d7/mukoxa.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/9p3ipgmir039b75v3fqcvo48pb/27280692419.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be93ac5d160---16024431668.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bcfdcead6---bovoleva.pdfIn PDF document text
    • http://3q1p.com/upload/file/210609011114765627ggxs9lsogk0d.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876663179b0---paxoli.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba49efdc9cd---xoxikeworu.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/zawukur.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a59776718---xozivuxojowe.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/ganosiwedarizavis.pdfIn PDF document text
    • https://linoforti.it/file/81842880221.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/topakusifixij.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/53830648326.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/50788146837.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cheat+perk+point+the+sims+4PDF 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_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000134f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 18272 bytes
SHA-256: 68d11b8335a2afb3afc693af1440024561993e758b3a7ced94397dcac7ac9953
font_02_sfnt_off00016550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16550 10672 bytes
SHA-256: c6793fdab331d081973d5d3cf58683595fc358bf38a853ed9cc7aa4a6bab2c9d

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