Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc3c6089bf13f09…

MALICIOUS

PDF

69.1 KB Created: 2021-02-23 14:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 090e8b0000f6c66a1745d6a811cb7fcd SHA-1: 539b43eda93322494f8b3a54e96661f96dbeaeeb SHA-256: 6dc3c6089bf13f09e8d45682d30a28443aee2c7f2fe4aa475c8c920a6f3feb17
186 Risk Score

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
  • 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://bologen.ru/wb?keyword=motivational%20interviewing%20book%20stephen%20rollnick PDF link annotation
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/vezikakowatunas-bosetevakolo-tanagijudagap-natakuwimaj.pdfIn PDF document text
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/miwosir-kavadireki.pdfIn PDF document text
    • https://nofabirudop.weebly.com/uploads/1/3/4/4/134455392/2263071.pdfIn PDF document text
    • http://wodebawoxisire.22web.org/proving_trigonometric_identities_worksheet_doc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449421/normal_5ffc0820e4c5a.pdfIn PDF document text
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/1993491.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/ahdU7sk/49787237060.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/L5agfd9/brick_breaker_glow_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/rwibm1P/61268461295.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/wUgdjf5/76059271007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5ffe21908993e.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/ghv7drp/monster_bash_pinball_for_sale_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6031f929e94b0.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/rjdZa7H/27723886182.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/negonanopix/autoit_script_for_file_in_ie.pdfIn PDF document text
    • http://lizomepikoxi.epizy.com/buvedibowexek.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/overly_attached_girlfriend_meme_template.pdfIn PDF document text
    • http://lakelasu.rf.gd/modern_family_episode_guide_wikipedia.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_off0000d074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD074 5556 bytes
SHA-256: acccba3109de8d6adaffb0e4c2a72916eb6cd79374c91b01462f7ff0c907092d
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 10372 bytes
SHA-256: 863c2319da5d51d350459343103d112bff7f8cb53758ee08a7fc3244877d0294