Malicious PDF — malware analysis report

Static analysis result for SHA-256 853cd29f3b3febff…

MALICIOUS

PDF

72.0 KB Created: 2021-02-15 21:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5d3e84fa08a5499a271592d3731daf8f SHA-1: d24a6a6d87769c10c8ad8a5c61578a3f3755cffc SHA-256: 853cd29f3b3febff9c6d8c94b439e2cb3ae0ab7a4fe9c17172bba47f1d9827a0
194 Risk Score

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
  • 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://crophysi.ru/wix?keyword=lecture+notes+apk+mod In PDF document text
    • https://cdn.sqhk.co/tebefaravuz/gcghjib/wreck_it_ralph_theme_rush_tiles_magic_hopper.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/kxighdY/43390119815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480732/normal_5ffe7b64ccbc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5fff3ff4eb69f.pdfIn PDF document text
    • https://cdn.sqhk.co/wamobuzo/idfFQms/48270212306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fe65f0c778b4.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/jseObih/greatest_hits_radio_liverpool_presenters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_5fdbcdce3557a.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/Fcuib5s/hack_jurassic_world_tm_the_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/jgW5isT/84597922562.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/tedowafomaru/40324288611.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/quadratic_equation_examples_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/wokavasu.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/96607525554.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/razedizesigirelegoni.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/fajerizagosavanavanu.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_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 5192 bytes
SHA-256: b24bb8927bc36fa96f35d3567032797292ac3a8978afd59147efa8d959c94152
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 10184 bytes
SHA-256: ff6e418f3dc73bb0101816d064322c7fe676a86976382c039332b7349b60f291