Malicious PDF — malware analysis report

Static analysis result for SHA-256 c287fd02859a1699…

MALICIOUS

PDF

81.0 KB Created: 2021-06-28 14:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c131725657e11dd01302feabba1df0b SHA-1: 24aa641fdc1d3dc606d50937f1db3cc7bc821779 SHA-256: c287fd02859a1699ae73d195835303df330c415bd6c0230807dfbaa337b409f9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. These links are likely intended for phishing or to serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/dilixofofoluzixezikapugon.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/l3ntnib633eengj59d0gb0fit0/96700359216.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2fe17779c---nesonudezoda.pdf
    • https://bursac.net/userfiles/file/xikoda.pdf
    • http://www.hangmandigital.com/files/file/bawativefiv.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722b039a302---xuwexibarewatizilir.pdf
    • https://stopserv.ru/files/file/14406249256.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608448010dfc3---lukazovew.pdf
    • https://uniontend.com/userfiles/files/kuvufesadexaxo.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e0151ecf0dfa152b3375282fb19e0762/52415437950.pdf
    • https://aneri12.eu/res/file/90686630052.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/1fb050a7e10b64ac71d944ac7fdb4a51/zuzixowodulapijuju.pdf
    • https://hashtag.school/userfiles/file/2843754356.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804b1e533c9---nexexukikatabopeka.pdf
    • http://solamsys.com/userData/board/file/63156102008.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a0e39aafd333025beb40e85dd6f4fb2f/bevuzafaketavunepalalem.pdf
    • https://beldaoyun.com/calisma2/files/uploads/pajifamaruguxodinoxosa.pdf
    • http://agiusfuneraldirectors.com/files/file/58487548956.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ba283ea58b1e0d421704dcfa2b7d2fce/lefibat.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070345d19d32---peraxilaxujamuxipejes.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/deb6945a4cab5f977ffe0620882d12be/jobepaguxisiratenoluwiga.pdf
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/pojomoka.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/097432a790dda17efcdd3b398f12e4af/virurepulonotejelujitot.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=chick+corea+and+the+elektric+band
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b0.bin
78f4fbde57e29a0444477a5cef8fa76cfcb28260a2d8e2e85f154720249767aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B0 10564 bytes
font_01_sfnt_off0000f0b5.bin
5b59ecf701b67973d0aeea9141572d2a42ff3934fc9c5f25bdf78f587b4bb5b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 17528 bytes
font_02_sfnt_off00011ed0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 16792 bytes