Malicious PDF — malware analysis report

Static analysis result for SHA-256 7496172edec85fb9…

MALICIOUS

PDF

79.4 KB Created: 2021-05-30 21:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ebbed4ba0d35ad4f46df6e634fe9a7b0 SHA-1: cafe9919d88767a9b220d5d97e26cda6aeb411e2 SHA-256: 7496172edec85fb94135a540cc75df2453e331540e5650150409a19e4a830603
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to direct users to malicious sites or for SEO manipulation. The presence of embedded URLs and the overall structure suggest this document is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=commission+agreement+template+free+word PDF link annotation
    • https://vigojipawus.weebly.com/uploads/1/3/2/6/132695212/3ba3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380881/normal_5ffce292848da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_60198388d6ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_60244ede53700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462096/normal_5fefdba88b072.pdfIn PDF document text
    • https://zewelujipe.weebly.com/uploads/1/3/4/8/134846298/9087722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_6023919e4afa7.pdfIn PDF document text
    • https://mivebomuponi.weebly.com/uploads/1/3/1/3/131398008/jefokipesajigad_bokugaviwezepo_ledasagigosoran_sekoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_603ab33a472ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd8339882962.pdfIn PDF document text
    • https://migerele.weebly.com/uploads/1/3/1/4/131453560/kunajixanarivi-minibomeloraka.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/wivibe-gogenetef.pdfIn PDF document text
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/pigiwobadoxut.pdfIn PDF document text
    • https://wajufavex.weebly.com/uploads/1/3/4/5/134587400/3691325.pdfIn PDF document text
    • https://ridimejaxokixis.weebly.com/uploads/1/3/5/3/135340331/giwulo_jopufuke.pdfIn PDF document text
    • https://jubolovewo.weebly.com/uploads/1/3/1/4/131453214/4757472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379221/normal_5fca5a9e7ecf2.pdfIn PDF document text
    • https://pujosudenavi.weebly.com/uploads/1/3/4/5/134508056/7055007.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/08571a3c-3d33-461e-8a1f-306c324cf5ca/club_car_precedent_light_kit_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e4f672-ddfd-4841-be8f-540d83323237/philippine_literature_short_stories_with_moral_lessons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ceefab0-a305-4ef6-934a-4611b77a8c12/mutadebof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7884eb-864f-4754-9609-6f0493e161e5/lux_win100-a05_programmable_outlet_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368a2d07-f343-427f-ab65-66d9c72511d3/como_agua_para_chocolate_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af967c9a-e027-4d16-9e2d-dac3f71e22ea/pubipuki.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_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 5356 bytes
SHA-256: 27386853207d19d7a1340a4391bfa270737cf4e7f26466467da4e6fe816a1faf
font_01_sfnt_off00010963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 11260 bytes
SHA-256: f1d1d911b56dc01049f5c6ffa5cd06175fed195f6355b118a79a8e1f4636478e

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