Malicious PDF — malware analysis report

Static analysis result for SHA-256 674660f31772f27c…

MALICIOUS

PDF

82.6 KB Created: 2021-03-12 21:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba01ab5c89a6e48c0ad27c2a7375370c SHA-1: 2ac52260e0dd7395bfef939a550ea1981d8433b6 SHA-256: 674660f31772f27cc130d7c6bafb8066c80764cabae36c6f3c21856836e1bc41
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various domains. The document body, though heavily obfuscated, suggests a lure related to 'javascript programming pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=basics+of+javascript+programming+pdf
    • http://theplafond.xyz/kung_fury_streaming_ita23b5z.pdf
    • https://cdn.sqhk.co/dukapudubi/U9ijnHZ/conquerors_2_glory_of_sultans_code.pdf
    • http://tourist.fish/gusupkmoko.pdf
    • https://cdn.sqhk.co/manuguwe/agghhnU/picture_quiz_with_answers_ppt.pdf
    • https://cdn.sqhk.co/rapovixovuti/hv8Q84y/gijun.pdf
    • https://cdn.sqhk.co/guwuweri/ejdjbgh/jiomeet_zoom_copy.pdf
    • https://cdn.sqhk.co/viwiratoposu/jfDPKja/ninja_turtle_fighting_games_online.pdf
    • https://cdn-cms.f-static.net/uploads/4487191/normal_60366e7fe3723.pdf
    • https://cdn.sqhk.co/rabuvimi/hLnhg23/pulsar_dual_fuel_generator_home_depot.pdf
    • https://cdn.sqhk.co/rapawaferew/ivvhdgg/10731027894.pdf
    • https://vuwejugo.weebly.com/uploads/1/3/4/3/134309576/3083063.pdf
    • https://pupinalakarer.weebly.com/uploads/1/3/4/2/134234580/jobavosezunivo-lasaga-zusufefiwajoji.pdf
    • https://jomufoxubibad.weebly.com/uploads/1/3/1/1/131164047/db5c8b2473751.pdf
    • https://kovovovugatu.weebly.com/uploads/1/3/4/5/134599685/7a7027501b.pdf
    • http://metalllift.ru/on_the_genealogy_of_morals_summaryo7bmv.pdf
    • https://cdn.sqhk.co/disonixures/ijibgjZ/40696921588.pdf
    • http://subfamjtii.site/chrome_extension_react_performanceb8tq7.pdf
    • https://cdn.sqhk.co/padixemugex/gzR3P3g/fapesirinid.pdf
    • https://cdn.sqhk.co/xuxodokoju/Yl0hhNG/mitig.pdf
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6049559c40175.pdf
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/dujudu.pdf
    • https://cdn.sqhk.co/noloxunipe/cdihv6X/43678809832.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f768.bin
e7dc420c3d3be4cfa196a144a401d2857beaa49642b931c378b254cfc034696c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 5300 bytes
font_01_sfnt_off0001094f.bin
6bd531d610f67e0ccd0de331e095c08120c78f3a36b220a6ad25b35ef3c11754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094F 10980 bytes
font_02_sfnt_off00012ea6.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA6 4324 bytes

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