Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea7c0c9fee49065…

MALICIOUS

PDF

85.6 KB Created: 2021-06-28 20:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32f04531d5bd3712ab0bc747f85d7a1d SHA-1: 907f4a9502e86d0d728d0c460a582bd9e6a37361 SHA-256: fea7c0c9fee4906529dac110c90e932ed4dad97c7147607adeba4b4362cc945a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute phishing content or malware. The PDF's structure and embedded links are consistent with a tactic to obscure the true destination and evade basic detection. No scripts were extracted, but the presence of numerous URLs on compromised hosts indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/41c461554d552bef9cd5d7ce97da504d/jevojulomegi.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af02d3b3f---munudemikodax.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/6325570b49e8ae17e13aecb5322f9eee/83576245132.pdf
    • http://leton.pl/userfiles/file/7175777027.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/21910b85318c22fda57d14f8a2e585e7/31148760822.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/29a7f18e0c72a0d2e3c0908651e4948b/27716262669.pdf
    • https://keluargamimpi2.com/contents//files/kijopu.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/in1takphmu5lgbjql68jlrmltl/fidusogufunuwogejudikijew.pdf
    • https://iohrp.org/f_files/files/49988792510.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/ccd21493f5c6296b4393f3dbf5d56b2d/tesagididu.pdf
    • https://telenovella-bg.com/files/54589573554.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d26f38b563---96336781688.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d315b77aa6b44ba6e3069db88d88b683/nerotebudixesupivafubidu.pdf
    • http://nanoscopy.ru/uploads/files/41693838073.pdf
    • http://ahkjt.com/upfile/file/64586624657.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af18091863---96458054460.pdf
    • http://ats-dz.com/userfiles/file/6587405086.pdf
    • https://chung-pei.com/userfiles/file/sovepi.pdf
    • http://rauvuonsach.net/images/uploads/files/dapazur.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/322560746fafa0bd14fc212ee6b48934/15753636000.pdf
    • http://ipmarketing.net/userfiles/file/zuragusalutifikukoluz.pdf
    • https://nevisnews.com/userfiles/zupunilexenanef.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/1uv6m4esb661uvv643ht4383q2/gigelepozarolipigodi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+rise+of+dinosaurs
    • 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_off0000ed17.bin
eefbbcb2a2eaddf6ff6efd9a5252c24e0d35a7a03de7dbe03b3d07870021bc89
pdf-font-stream PDF embedded font (sfnt) at offset 0xED17 16756 bytes
font_01_sfnt_off000118b5.bin
7814ff4d53efda48dd4e6eb87549657f76a4c06c39d688fbe834ecb2a305ac3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 10372 bytes
font_02_sfnt_off00013015.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13015 16792 bytes