Malicious PDF — malware analysis report

Static analysis result for SHA-256 299c567c5c419572…

MALICIOUS

PDF

74.6 KB Created: 2021-06-15 20:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1d38320771e0a09c5a491402022854f2 SHA-1: 2c29a47b8638bc2f3fc11e9ce6a7dd4e48a99458 SHA-256: 299c567c5c4195720c3862674447ee0e999f0812d6ff2d9ed22c02f6a28f24cd
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 large number of embedded URLs that point to compromised websites, suggesting it is used as a link farm to distribute malicious content or conduct phishing attacks. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a deliberate effort to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/uplcv?utm_term=black+desert+mobile+paladin+build PDF link annotation
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f8a321e99---kabonapilivuzedel.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/wenataf.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/506d29d94c85f0670c994c21b1a053d0/32825094061.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3711fc587c---lerebixapetit.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087e875772bf---gozas.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608554186abea---kujogadazer.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/jumukaxisogitosuf.pdfIn PDF document text
    • https://chp-travel.ir/data/file/30179305173.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/4117c251e56b004c1a5500637fba9da8/bexirilexa.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095f98b46feb---7617029409.pdfIn PDF document text
    • http://enricobarraco.com/files/kediziwoduka.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/24705343534.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/0n6f9tap47o4trjnqksl9e089h/sojazoxamosifafesojabim.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/zudupavura.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/94a255770cf1fa5b6d5a913c7f987c59/xojakuseluzilumunugulijom.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7999a2e096---palitawovalofubapobod.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/92281179229.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160745049738d3---lenododow.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/lodovedofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 5472 bytes
SHA-256: d90ee43e4b9b25721a458b6a38043f33e1b7f30a19f0107d30c0b8e74c5540dd
font_01_sfnt_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 10544 bytes
SHA-256: 20869c3c3e95e38ef14342335cf959e5ddba67fab3f52e17578046de8aa68177