Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bce4500c3f2558…

MALICIOUS

PDF

74.7 KB Created: 2021-03-03 14:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28b0769a271b43ce62e644cad178e99e SHA-1: 12842638380a08e1f4a93c056e8548d0bd3ae053 SHA-256: 19bce4500c3f25582b57aa3b245c537eb362e699995401ac39b7b68e49a88b4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'drawing'. The presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/award?keyword=three+quarter+view+face+drawing PDF link annotation
    • https://cdn.sqhk.co/padasagam/iaxjb29/mp3_mp4_player_app_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd5317079b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5ffbc6a00a139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463308/normal_601cdc7e5fe56.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/Nh1wFig/jewuvurafolesedowiza.pdfIn PDF document text
    • https://lupirolawa.weebly.com/uploads/1/3/1/4/131453436/pidowibopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530712/normal_6035862598bef.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/dwzgiBg/ethiopian_airlines_cargo_plane_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/jgBic3B/vakigasajupipetomazi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453890/normal_5feccffd7e466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godewumazek/32372786532.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/52914720452.pdfIn 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_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5300 bytes
SHA-256: 7c55b6129696491a5d4dfe7c67e278a1dcb926b5e751ba0b7eed629db3faaa41
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10240 bytes
SHA-256: 248727d8a3f26674a8a839a8d29e74a8b52ac353e611a8cc92c0f25a104659d6