Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90ebeb93e0aeb90…

MALICIOUS

PDF

97.0 KB Created: 2021-07-25 11:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c3eb26104fb21066ac306b3d7608141 SHA-1: 655c604b3e24b22b97683e4b787110df8dd4a63a SHA-256: c90ebeb93e0aeb90e6b0cc5a91f62d951f4ea9a02f73969ca90b1fa364d77665
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

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://www.evisiontiendaonline.com/ckfinder/userfiles/files/fijopinufevizejumodipez.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4e427bcf8e6b2271a14e8d79da8ea886/lumagapixozafujok.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2c6fcfa01---wezetawu.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8f60c1f04---70364572526.pdf
    • http://2ds-creations.fr/userfiles/file/pibatimeduxobufuz.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cfab380ef---95713275544.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/0a4e37a3e9c45674ff17912f85eaf8df/nabubupatokalavejupamoj.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/32155cb3657eb1ede31952de3d453597/88494551640.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b132709bf---60709850700.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ecfbdbf1---xawasamoladovamomikeji.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bfcd25a10---vupepufemoligujumajes.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160809df46110c---rurazejeno.pdf
    • https://aalatour.com/basefile/b2caalatourcom/files/71029322359.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/367e4924ae01d4a7a0641a5a11b02ee4/zuwibinumida.pdf
    • http://www.ferm-matic.fr/upload/file/fimegivimajeb.pdf
    • http://gibisch.info/files/files/ruduxupewud.pdf
    • http://mazdooradda.com/userfiles/file/51939010232.pdf
    • https://kipass.fr/userfiles/file/94719001503.pdf
    • https://alianzatours.com/imagenes/file/jemefaki.pdf
    • http://brixtontaxi.com/survey/userfiles/files/rerekuxemekabu.pdf
    • http://jar-ted.pl/file/sizobasub.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/tpb10f70cc4dn52u1aqft8e9fu/labegigusitifosex.pdf
    • http://carsonpokebar.com/uploads/files/vulufetebesojubu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=radical+compassion+tara+brach+reviews
    • 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_off00011a5b.bin
aab8916d64f4d2f232e6c9da6e7b386234650c988b0bb9e4bb143b49fe80a887
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 16600 bytes
font_01_sfnt_off0001452b.bin
1f120557449aaa688c24a50c26f0eee3674efb99ae8909fbc5fb9a7d94b0a2ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1452B 11116 bytes
font_02_sfnt_off00015eb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB5 16792 bytes