Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa084bbe7dffd1c1…

MALICIOUS

PDF

77.2 KB Created: 2021-03-31 01:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 116be541c363b62b7fa7f5a7c57f691b SHA-1: c268efad3081f33b1d9223c8306f0e7d05bdef15 SHA-256: fa084bbe7dffd1c152b0b272081c0bf3ab274b0f1601cf4f44699ca05e0c9dc4
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to S3 buckets, which is characteristic of SEO link farms designed to improve search engine rankings. One prominent link, 'https://xajibur.ru/strik?utm_term=canon+ip90+os+x+driver', is identified as a redirector for free-download phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/strik?utm_term=canon+ip90+os+x+driver PDF link annotation
    • http://comp-arenda.site/les_regles_des_accents_en_francais31cuw.pdfIn PDF document text
    • http://zuzudijibogojag.22web.org/visual_certexam_designer_free.pdfIn PDF document text
    • http://clubstore.pro/free_certificate_of_achievement_award_templatef50fd.pdfIn PDF document text
    • http://kyrgyztours.com/xafewivuxigazefilivibim3sthw.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/voxipanovigepiv/1862962865.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/nafelavepevuv.pdfIn PDF document text
    • http://tifisadadenori.epizy.com/pasemotefokare.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/tafaxebogozededanovu.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/free_responsive_website_templates_bootstrap_4.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/badger_insinkerator_model_1-87_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/93960044008.pdfIn PDF document text
    • http://fevakizifawe.rf.gd/81965628903.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/window_envelope_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/countries_formed_out_of_yugoslavia.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/hp_designjet_500_plus_not_printing_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/83032941142.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_5aa5cf628e07465990960fb8c2ed57b7.pdf?index=trueIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_275cc21c529a44aaafc9afa23a793e03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/block_story_recipe_editor_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/jukafuwobez.pdfIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_f6b5357a86494076b4d98d2b99f763b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/goal_setting_for_middle_school_students_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/trastornos_alimenticios_concepto.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_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 5080 bytes
SHA-256: 9e58229f9b6b5fc1ccaee5928e7ad61a52a89e96bd5a9a8e9babd11a2411e9bd
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 10644 bytes
SHA-256: 547f504e14688c5b916dfae31e64774c558ffcdb252f0fef70f61b8844ce1afa
font_02_sfnt_off00011966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11966 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361