Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc556463235a5e3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-11 01:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 780d0672c358f41a34c827fda578cf60 SHA-1: bb2ab675a5e394365c6bc98652ce2360b9a544e0 SHA-256: 3cc556463235a5e3c8fc6582475c096f48580aaf3733382b13662cfcb9086929
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful sites. The embedded URLs and the document's structure strongly suggest it is part of a phishing or malware distribution campaign.

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://bologen.ru/strik?utm_term=how+to+build+a+easy+modern+house+in+minecraft+step+by+step PDF link annotation
    • https://cdn.sqhk.co/porosobof/DHbhejf/minecraft_pickaxe_png_transparent.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/21392890744wj0mu.pdfIn PDF document text
    • http://delayikapy.xyz/freeman_the_revolt_of_motherpli14.pdfIn PDF document text
    • http://copyrighthelpcentral.com/kenmore_washer_80_series_wont_drain_or_spinqrwr5.pdfIn PDF document text
    • http://creampiepow.club/background_video_recorder_for_windows_7kqnqp.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/jGheK1Q/how_to_make_a_bridge_over_a_creek.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/b8eb9e262.pdfIn PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/lugipixojo-gividemul-nuziwilin-rutogezepum.pdfIn PDF document text
    • https://ropadapolope.weebly.com/uploads/1/3/0/9/130969983/762b5.pdfIn PDF document text
    • http://sweetmeet.online/11625870296tsqgb.pdfIn PDF document text
    • http://mbfsopg.com/mechanical_engineering_internships_wi61wg0.pdfIn PDF document text
    • http://texno3ua.com/xaroxiahcmm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_c9166f48cfbf42f38f0a0e8da1eb982b.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_1a4a5e9f7f70443f82583166b265c220.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/bill_of_lading_short_form_fillable.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_61bc9640fe9941f58f9531d3a8118909.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizedumi/lutidafarijebezalafewodom.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/387521963.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/javascript_add_json_to_formdata.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_off000102cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CD 5688 bytes
SHA-256: c36b95e24dc372741cb958393bb29904e1db35dc5b813778c1553af151befe37
font_01_sfnt_off0001160d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160D 10652 bytes
SHA-256: c6c01ef7798d8f2af0f173ae721203638a0c5fbbfe3c1e27a5c03a9fa00839c1

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