Malicious PDF — malware analysis report

Static analysis result for SHA-256 225909b61c12da28…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 16:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0cbd36acb8dbf8dc77477ca24de259ce SHA-1: f3a376bcb5363a0636f88bdf7f4dbada7a99944a SHA-256: 225909b61c12da28bcf11575c482e80a07f563520867f063323e01193c96b716
196 Risk Score

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.
  • 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/wix?keyword=happy+birthday+britney+spears+meme PDF link annotation
    • https://cdn.sqhk.co/jobebakegip/jjMC8tA/gowotipet.pdfIn PDF document text
    • http://aycotoro6.xyz/what_are_the_benefits_of_time_management_skills89aqv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5fd9423b8e15e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_5ff823ac93862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_603e65400fcf7.pdfIn PDF document text
    • http://agencymedia-ig.com/deathclaw_egg_locations_fallout_76lbq0j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_6030d986ed8d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fcca75f0f17c.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/C1iimhb/tuvetatojivinapawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5fcfe76a82d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_60199ed73c00e.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/pojafagebadexarup.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/g8WCjiC/royal_caribbean_cruise_uk_contact_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_6022c049449e5.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/kavalukato/3367981629.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/ben_ten_up_to_speed_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/brother_mfc-j615w_wireless_printer_setup.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_off0000d2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 3396 bytes
SHA-256: a66f2836b8510e64d1b867e6ba3ee7970e9c684ff7a9755827bf821a4eaf3da5
font_01_sfnt_off0000def4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF4 5368 bytes
SHA-256: dd2487e18b58b34a5ad767bc826217d3ceef94b82b30fed83026ab341ac3fa41
font_02_sfnt_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 9996 bytes
SHA-256: 9f528be6c8f35363bee80ba5c612554c0e046df5a05fde1de6aa083c54ace4b4

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