Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b81aff5f7d034b…

MALICIOUS

PDF

72.8 KB Created: 2021-01-31 02:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b8f3cd2d5fa62376ae9394e56fa4e0d4 SHA-1: b192b6c8774dc1271b27f047b89bbc4d8af750a2 SHA-256: d1b81aff5f7d034b0ca48f4ee7f2ce30183b41f9b84b4e31996ed7095f545644
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/aws?utm_term=vex+robotics+programming+guide In PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/1824012.pdfIn PDF document text
    • https://cdn.sqhk.co/zepinima/PhasgfR/8169530939.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/BfTHzif/galactic_civilizations_iii_intrigue_expansion.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/clnge1i/11820859594.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/61b19bbb164c42.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/0rgjpha/48063919763.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/takaligofuxe_wevoko.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/b991895c24a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_6001dd68e59dd.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/jcicUgg/rilakkuma_farm_fishing_rod.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/rabewiruzitewa/54247916048.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/sunet_anti_caini.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/pivekutepululizipere.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/16242450732.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/94955742672.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 5536 bytes
SHA-256: 3b406e79623fa2295f942ad3016ac852a094f1f11305523f530dd8ea51a76b62
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 11336 bytes
SHA-256: e91f5e0830e254fd89c6c17bb5c9757b8aa2902a0e0ab6c54cad96df0391fae5