Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f203b47298a52a…

MALICIOUS

PDF

96.6 KB Created: 2021-06-28 00:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6be3d8ba5ebd561a3a7dcf0be68d21b5 SHA-1: 310183295762405839d03c67e92646621dbacadc SHA-256: 90f203b47298a52ac738ec65c3fa8a680b54e877f14f7d7f40f2b27e9624c819
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the nature of the link farm and the detection suggest it is designed to redirect users to malicious destinations.

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9bcbdcc2e---rovogobodewopi.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/jazukifevito.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/in42cglbvhui46i7r5submbsf4/22607273506.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ma34offp4e0vihreoh4ds3acad/15320821101.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/r56o497t0tfe4i8ocq7pjbumjj/xulupafasozegunob.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/c4e8081937141cda420835192663662c/7704664337.pdf
    • https://eravukappalpalli.com/userfiles/file/jigiwexukiwasisibux.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/50797232885.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094ad964dd0a---gujeni.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebbaa28685---rusaretivajamikot.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f3279544b---68589748876.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9457c89487---5108107500.pdf
    • http://kurdumovldpr.ru/uploads/files/22572466504.pdf
    • https://arichaindia.com/userfiles/file/3294350078.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/d3fb989111191c87a0e3093c9547156e/sazibabozupara.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b13e43a8033259d8dca868f81a6b44e9/pabis.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/551e95d3cd1856285332dffc09819a3d/dotutozufarimuzugezaselo.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c951a3e4b9a---55575132264.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607836aa069c6---50869013188.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609499fd5d3cd---46979553101.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075781edbddf---fafamukiruramimux.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/xotupoxitizo.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/c068e52ccc97deff8dc672e2a21468c7/fevoj.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e914184e9a---dukagagexizivunidumav.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=winter+family+vacations+on+a+budget
    • 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_off000114a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 16792 bytes
font_01_sfnt_off00012cbb.bin
678a3d9275e4cde126cb24679c5ec9475e93452a5b5dedfef75a86b8f9012237
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBB 11232 bytes
font_02_sfnt_off000146e6.bin
3a37f68f56687d5633e4cc4187c34cc15f5293c790673efd91eecf4e9923c821
pdf-font-stream PDF embedded font (sfnt) at offset 0x146E6 17488 bytes