Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9bf3df414f3542…

MALICIOUS

PDF

74.9 KB Created: 2021-02-27 06:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 675d57c8df9ebf60b7baffa0bfe94514 SHA-1: 943a00a0e5785a3f6403fff83465025b07e1ea68 SHA-256: 6f9bf3df414f35425faff129d8c807cd38d5d5130b901c2b204deb04c4bb1633
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=flat+stanley+book+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fcc0eb82203f.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/hjc3iaO/18199944381.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/eXgh7jg/33959353294.pdfIn PDF document text
    • http://matroskin.space/aerospace_and_defense_industry_overview6z6w1.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/nBdigfd/79687168949.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/hijNFOh/blood_pressure_monitor_wrist_reviews.pdfIn PDF document text
    • http://metalllift.ru/48673358202gj8kz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372371/normal_5feb7e2c682bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384045/normal_600031d62e1dd.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/tYjbrf6/mineral_wells_wv.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/fJia2Ap/dining_room_table_sets_cheap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5fd330db65109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_5fffb672d7c16.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/wgigjoN/residence_of_evil_gameplay.pdfIn PDF document text
    • http://mamajan.space/20890574314aoelv.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazolefozu/dge1jbq/vidome.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/4mIjhji/the_cult_of_chucky_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitatotol/greeting_card_templates_for_mac_free.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_off0000e7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 5200 bytes
SHA-256: 07f4c17bc8d844c9b7a82404326520fe407ad2b390b7a7bba07d1f79e9888d47
font_01_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 10896 bytes
SHA-256: 6b3e863e73cbb7abd6a8bfbcfeb2b1c206b601761465b83ca37b6b2b4e4328b4