Malicious PDF — malware analysis report

Static analysis result for SHA-256 2606000fc3833728…

MALICIOUS

PDF

75.3 KB Created: 2021-02-24 04:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 55030b7af1288a54ec7f1dee21c00a78 SHA-1: d20e08d5a26fce37d5f66978dd19c524a5859e9b SHA-256: 2606000fc3833728a2399165bd83f0d72d384f615e9451929e0835cb07acfcd5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://seumenha.ru/strik?utm_term=is+chicco+keyfit+30+faa+approved PDF link annotation
    • https://cdn.sqhk.co/mekizojo/vid2xha/daxodedozarorojozagupus.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/5795398d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_6000a6e4e27e6.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/1c81b6faf27dd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470019/normal_5ff0ec2ead55d.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/iaiijew/download_game_air_attack_2_mod.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/rezipovopob-besorofevot-jeziwesugugu-xejanisavoxid.pdfIn PDF document text
    • https://zunimivivonuz.weebly.com/uploads/1/3/4/0/134017399/mekediriwaziz_bapev.pdfIn PDF document text
    • https://tuzuratodaf.weebly.com/uploads/1/3/0/7/130738639/tubomevirorem-kejowige.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/foxibi.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/giparedetuxonifuvewo.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/3b50d.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/lupebesu/76443227913.pdfIn PDF document text
    • http://lagorov.rf.gd/12th_half_yearly_answer_key_2018_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/wokivamuwosivodakodek.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/minor_car_accident_report_sample.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_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 5680 bytes
SHA-256: 021dd6ac7d13f14d019f11a68912a2032d82817cadb9370370202b803adf0678
font_01_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 10532 bytes
SHA-256: fb185ed0548c7fe2e022d76314470859e38cd51e1ffc89c1110944bdd7b7d824

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