Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5d01d7a7cc38dd…

MALICIOUS

PDF

93.0 KB Created: 2021-07-22 20:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c09f07facbd184aa0f78d70dea0a78b SHA-1: 8595dd12f3f3f0db5f6f276666ff323979618eaa SHA-256: 8e5d01d7a7cc38dddde8e858cc654e4d7e6766ec492daa01b20e3311b842e746
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the presence of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://annamsaigonlaw.com/upload/files/refilekutizulinapu.pdf
    • http://czpohledavky.cz/userfiles/files/81783514884.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/sotivawudizasozemadalazun.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3181120c0eab481979d947badae5a1b2/73384433081.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/80c0adcd9fdcdb49c65b4af3d3b5e760/69269900086.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/9d043de11be45ca323bd57ddc8f8a80c/tufafosipolik.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/bvieajb3mhcblti7i8jja6ee70/fawefogifa.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608f17a4e4731---54598089979.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/27533705440.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf5be62f3---famigixol.pdf
    • http://clasesholandes.com/userfiles/file/14193273534.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6a9ccd777---71071361873.pdf
    • http://rnsnider-classof-68.com/clients/9/9a/9aaec9a1f64917203b32d8bba7bf2533/File/nesesuwoxufuxiwom.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d818d7585---21389914627.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/08511f723723f17fb524a68d6c21f203/zujazosusosepubu.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0ovk1fklqorv1sunc7dirdqn0g/90337612616.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/sodipijirisokufiveki.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/3b5ppv7vjapummprghnfput18r/dadusedusumosijazuwapabu.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d6ca62789---gutudon.pdf
    • http://oldtimerclub-thueringerberg.at/images/file/53425216638.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e0b0jt65ihdmb6p7fld5mp0bmm/4991812696.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607511d5e9b42---85371317081.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4fa9074115a44eccd02127d98b8dbf18/lafajipifekowite.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad4687cca---wejadov.pdf
    • http://accessprecision.com/userfiles/file/wolemufiti.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/8c24323ccd08939bfc10f4e9b43c940f/nukimewufekoredademeji.pdf
    • https://kolbandibileklik.com/resimler/files/76124827334.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=steps+of+afb+staining
    • 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_off000104e6.bin
d7805ec0df850288d6a8e3ab104fc2971efb7ff3b7d97048d7439c1ca0cae087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 18620 bytes
font_01_sfnt_off00013562.bin
955fca76704baf8d9e06a46c94fdeec427c76233d439d3b5204dd4631d144cdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13562 10604 bytes
font_02_sfnt_off00014d88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D88 16792 bytes

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