Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c933862d38ba37…

MALICIOUS

PDF

116.1 KB Created: 2021-07-02 12:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6bdf886419dc88742e74736977bc55b4 SHA-1: 7d69e6b5e85b51acb852d82d4eb9b9815eb5e5ce SHA-256: 14c933862d38ba37f175e144d70dfe47d0ea86bbb2787bbf82d78cd0b365b817
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely leveraging a PDF vulnerability or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=if+the+demand+for+a+product+is+elastic+then PDF link annotation
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/43e05753f5d8b3f146a3c520bce66505/tijukereredivoja.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609596ff2b044---27906601366.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/9bpf3i571tt08hvn7l0plgierh/81468061354.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bbc5ed8f6---93069735857.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90308831007.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/69765080259.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2d04e4b5458e30b5ec84acf3158e058b/muvijilujogorinonugowe.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/65341438816.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/80583840217.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3h8gg9virainonikipv966s684/saditadojodoti.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6290d25822e8b8349295c66e6a9d7a68/zumulija.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0301475bc18001c526211c2e8b9692f3/31215495860.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/99491483150.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/da5qh0i5niathee6j1vcono8la/karowexowisorajoxodiwabe.pdfIn PDF document text
    • http://drironcat.com/images/file/sofozevanotavasami.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9479c393692e118e644f81ab0f5bdc03/nodegugokodunoku.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/fitukinalufitozit.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd25d08a4---25690625836.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/hk15rvk8gj4l7uaad7egfblb4f/pumakob.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/255308e1016a650d069524129bc4a7ce/lusakabotekadageb.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092abf99341d---30460144563.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/74382007081.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e8c407524102f1a9cd0643251ae5884d/penejijemifaw.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a315b072---41195894003.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f33f29df32---40920141227.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160959305d744c---nawoxawuniteparulabobod.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DD 10936 bytes
SHA-256: b7c3cab1da0781610f726542d2999a41d18e97fe793f475d6b16644e2a41b09a
font_01_sfnt_off000161fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161FA 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
font_02_sfnt_off00017792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17792 18872 bytes
SHA-256: bc07fa8edd5de26c501b8c5220da2f39bf55e85ab3d2ec9280827627c54baadf
font_03_sfnt_off0001aa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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