Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9166b22086c621b…

MALICIOUS

PDF

81.7 KB Created: 2021-02-09 09:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 216de5d9143d89e8d95ea052ceddfcf2 SHA-1: c882e3467ed1065440ef03ae6365c25e6a586c97 SHA-256: d9166b22086c621b7f3d8298094edc54d76e8dd6dec9ecb93920aecfbd3603f2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=bamboo%20sheets%20amazon%20uk PDF link annotation
    • https://cdn.sqhk.co/jazumagefo/hfnhfij/teacher_assistant_grade_book_target.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/vanadejuwujulaxokir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472783/normal_5ffb62925713e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_601501c1091f4.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/6178805.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/pebiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_601a0961d0b95.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/pogolo/join_files_command_line.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/championship_manager_17_mod_money.pdfIn PDF document text
    • http://lezufixigise.rf.gd/anatomy_of_ruminant_digestive_system.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/narirukarinusawokat.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/tuvil.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/47177096889.pdfIn PDF document text
    • http://mevekanuz.epizy.com/83751558894.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/2015_cadillac_escalade_manual_key.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_off0001038e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038E 5100 bytes
SHA-256: 5efd788907a413a3523cfa9d8dc8a42e944d407fcfd09724dbc64b49e6720659
font_01_sfnt_off000114cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 10976 bytes
SHA-256: caad3109208b89538b26b742fca68ca3294385683c7eacafe9e58979b286748a