Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f602199b733670…

MALICIOUS

PDF

74.5 KB Created: 2021-06-05 13:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 774bd45816e113c0715a8732e3159a19 SHA-1: 72474933e98efec888025d75c2649b674960b8b0 SHA-256: e1f602199b7336703ba36d5fc6f028fe2c78f8dca4366d0106f9f990091ce084
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, characteristic of a link farm, with many pointing to disposable hosting. The embedded URLs and the PDF's structure suggest an attempt to manipulate search engine results or redirect users to potentially malicious content.

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://gimoguvi.ru/123?utm_term=gazebo+design+template PDF link annotation
    • https://mikezopa.weebly.com/uploads/1/3/4/3/134366842/pomivodili_tagofuwo_gonazilegepa.pdfIn PDF document text
    • https://fenazimo.weebly.com/uploads/1/3/4/4/134437137/narorifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418185/normal_5ff03ab5e69db.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/kedaluromanuzavux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_606cf14587b12.pdfIn PDF document text
    • https://safuziketuxoxu.weebly.com/uploads/1/3/0/8/130814855/2418bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_601acca0859fc.pdfIn PDF document text
    • https://guveroza.weebly.com/uploads/1/3/4/4/134484502/vukemi-xezujajekadawil.pdfIn PDF document text
    • https://kinumonitebira.weebly.com/uploads/1/3/4/6/134605003/setexakapeda.pdfIn PDF document text
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/nuguvovojote.pdfIn PDF document text
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/c4213a08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezaloribed.pbworks.com/f/86457623542.pdfIn PDF document text
    • http://kejuziz.pbworks.com/w/file/fetch/144574647/gekodamurodujavelobi.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144521196/5_stage_grief_process.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/how_does_robinhood_calculate_dividend_yield.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/how_to_sell_karatbars.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/rational_numbers_class_7_worksheets_with_answers.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/84949458857.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_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 5404 bytes
SHA-256: 5728aa45cb92e161c251724caef619e66e855e9ca031db1ac35f6d94e7034792
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 10552 bytes
SHA-256: 233082ff168adfbc8c7cd2b008a8264fb11983d116ec91633f9dcef4ba98935a

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