Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc68dc6ae272fe7…

MALICIOUS

PDF

87.7 KB Created: 2021-02-16 11:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7e52b1e77775944c7d18f1fc85212d2d SHA-1: 9bec21d95252c356519ce8270abbcdde871438d4 SHA-256: 6dc68dc6ae272fe7448bce2012ce72d00979cb8735fa4fba45578f34cf6e313b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=3.5+bone+knight PDF link annotation
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/gajes_lewerof_sefenamadaval.pdfIn PDF document text
    • http://hrushch.space/3809234831rnpvl.pdfIn PDF document text
    • https://maninidepot.weebly.com/uploads/1/3/4/7/134702581/walowuxenirolep.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/gdgf1ja/anime_avatar_creator_games_online.pdfIn PDF document text
    • http://ideaita.fun/nifevusowiruxoduli21e3h.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/hgZqhju/how_to_play_pyramid_solitaire_windows_10.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/xaniwiruwo-wikizozegegepo-jubamudesej.pdfIn PDF document text
    • https://fesimubigezati.weebly.com/uploads/1/3/4/5/134515628/goxamigomigu.pdfIn PDF document text
    • http://yesitalia.fun/nerevoldq3xz.pdfIn PDF document text
    • https://cdn.sqhk.co/kadefowuvun/jgdm3dh/69462966306.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/sgdgjRB/43407023517.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
    • https://s3.amazonaws.com/rafiralexezol/ryzen_3600_overclocking_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/42237617999.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/learning_generative_adversarial_networks_kuntal_ganguly.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/kumaxujasike.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/microsoft_sql_server_2017_enterprise.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/ronaxixelosadukinevi.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/pufap.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/67405480339.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_off00010f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F24 4648 bytes
SHA-256: 995d804e779b74a1a6af51722c636d7b753ddfe3f1df507eb4768e228f6d53ff
font_01_sfnt_off00011ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 10740 bytes
SHA-256: e88404bfe0133e6db3dbe258709ee99a5887fc061f5769cd55f50c37ca84ab0e
font_02_sfnt_off00014372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14372 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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