Malicious PDF — malware analysis report

Static analysis result for SHA-256 401db278f5f9e1f7…

MALICIOUS

PDF

77.0 KB Created: 2021-02-23 06:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 696826211e318403a66a10c3e798a159 SHA-1: d1dd63a70e31c324021b25d76ab6d6ac920a3f80 SHA-256: 401db278f5f9e1f7a55d97ff7194400d605ecb0336de4b82daac7594e94e853f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/strik?utm_term=el+monje+que+vendio+su+ferrari+resumen+por+capitulos+pdf PDF link annotation
    • https://vesizolakaz.weebly.com/uploads/1/3/4/3/134333528/40a61ec247f33a4.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/b9708a18.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/11b174be709787.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/leluxuzuj-tatupotejata-fidixuximes-fekajege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fdf8b3132e76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_60239eef8de6c.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/dotulapasul.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/majetisifeliduv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453540/normal_5fef93918e62a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_60336e6835a3a.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/riwemole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5ff58e06d9c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_5fdb28df20783.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/91dcfdaedd3aa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462345/normal_5ff1843a913ff.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/3830760.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/sutawowirosuvuv/66419614137.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/cognitive_behavioral_therapy_worksheets_printable.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_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 5520 bytes
SHA-256: a462de462015022c2079781ffead3e1ccc1263855f41f7da856b1ce753df2a7d
font_01_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 11212 bytes
SHA-256: 2c13b76c6a550dc818f34493e5605de0f33355bfa7eb2d0a1f3ef546c57d4f6c

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