Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c30094ff2b70f4…

MALICIOUS

PDF

73.7 KB Created: 2021-06-10 01:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 88d9fc7aabda1cf90a479adb084820d9 SHA-1: 56a55ade37368a5e64ecd56b06c9a8e87a307d05 SHA-256: c3c30094ff2b70f479c672eb6ba7f9087a2d2b3857d31771fda10b6cc3cc9d17
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are associated with SEO link farming and disposable hosting, suggesting a malicious intent to redirect users to potentially harmful content. The primary URL, "https://drafthe.ru/pbw?utm_term=windows+7+service+pack+1+activator+free+download", indicates a lure for downloading software. ClamAV and ML classifiers also flagged this file as malicious, reinforcing the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://drafthe.ru/pbw?utm_term=windows+7+service+pack+1+activator+free+download PDF link annotation
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/vojelezedat-lidorazubag-lomojapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_6010d5abe6ac0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5fee082f96b32.pdfIn PDF document text
    • https://fudonorovivur.weebly.com/uploads/1/3/4/6/134665028/likukafofufi-nuwumarexi.pdfIn PDF document text
    • https://danodukuwen.weebly.com/uploads/1/3/1/6/131637043/3129800.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/a34d3049ff47.pdfIn PDF document text
    • https://romasagato.weebly.com/uploads/1/3/4/7/134723475/7222179.pdfIn PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/gokokixuvol-nalokusujaso-kozadexeruw-redawetiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_60501d3e56124.pdfIn PDF document text
    • https://divigutokorafo.weebly.com/uploads/1/3/4/6/134683056/7379736.pdfIn PDF document text
    • https://xovodozavaso.weebly.com/uploads/1/3/1/0/131069890/3293801.pdfIn PDF document text
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/zotezowewopujewobaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_601304c81f4ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/169944a1-5ea9-4cd3-bc3a-2d6ef3a5e3d2/vujuzu.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144998079/35369728105.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/vasika.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/civil_engineering_geology_textbook.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144756429/47990307006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5efd779c-9a07-46e2-834e-b5896869474b/35869160634.pdfIn PDF document text
    • http://zuxanuj.pbworks.com/f/minecraft_pocket_edition_texture_pack_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c202a01c-0bd9-4f60-81d3-647d485e92e9/2020_ford_mustang_convertible_ecoboost_premium.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/mustang_2060_parts_manual.pdfIn PDF document text
    • http://gafuxexosaru.pbworks.com/f/92475779329.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144499458/18933062261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c090ce79-997f-4d09-8323-e3aa1414c680/82323321748.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_off0000e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44F 5508 bytes
SHA-256: e894c6d41d70287fb308a57d39a009b7d46de6a3f5e8afa80e2c50d4aa85164f
font_01_sfnt_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 9976 bytes
SHA-256: c1991b15589565b25ab0e9ff40a94f4da87aec4827d82c73fee34d34b77f64e4