Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec1965ababe52e2…

MALICIOUS

PDF

82.0 KB Created: 2021-02-14 07:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bc1984bce1f9a501c1c057c11f0c8f2d SHA-1: d7fd54823f310b9e590d0c7363ec64040498b035 SHA-256: fec1965ababe52e266edde7dd94a492f1289e1bf2633a202e17e497e835c9a9a
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, indicating it functions as a link farm, likely to redirect users to phishing sites or other malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to manipulate search engine results or distribute malware.

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://leonvi.ru/123?utm_term=watch+guardians+of+the+galaxy+2+online+free+reddit PDF link annotation
    • https://cdn.sqhk.co/xikejuji/jbAfgeP/21952912220.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/niahige/texture_pack_dark_mode.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/betefenokawiba.pdfIn PDF document text
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/5815629.pdfIn PDF document text
    • https://riwewupurudo.weebly.com/uploads/1/3/1/3/131381540/vaputidaw-polonu.pdfIn PDF document text
    • https://bimuwosexiwo.weebly.com/uploads/1/3/1/1/131164043/zezud-gariniwaw-siwozaz.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/manumeturesusimu.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/pizegiwuzizaxal-sugimidejiboga-vukip-vapinor.pdfIn PDF document text
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/lizafor-novovipivuj-vemijitofome.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/misuxomolunasek_sevogamibot.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/062e1615e6.pdfIn PDF document text
    • https://romasipunup.weebly.com/uploads/1/3/2/6/132681769/6197251.pdfIn PDF document text
    • https://bodujifoji.weebly.com/uploads/1/3/5/3/135394102/bolasewujotinopug.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/g61jjhf/airplane_movie_meme_generator.pdfIn PDF document text
    • https://pagopolekabob.weebly.com/uploads/1/3/4/3/134305888/vunovaxijonokaveno.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/kJgciey/93354406118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://femavumifixomud.rf.gd/car_games_qawwali.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 5480 bytes
SHA-256: 48ce4b0fd5b04335cd82106eb93654c8608d2477bcd6033a0a58fb20cfa69bf6
font_01_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 10720 bytes
SHA-256: 767896d046bac151c49ea311f1f5423514486cbefbe1987c40eb41e670c7bea9
font_02_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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