Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b5270826a51819…

MALICIOUS

PDF

72.4 KB Created: 2021-01-28 22:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c8cd7c477ceecba6fcff1b2d08dc0e4e SHA-1: c04247d941721fdcce1b4094ceb47e03de463b30 SHA-256: a8b5270826a518193ad5910c1c15d7d703fcbfc93638994e3151020f5279696a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=king%20ball%20playground%20game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417226/normal_60103c2ecb863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_5fd7ce7c02b26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5ffd662c7b0ab.pdfIn PDF document text
    • http://zesamoa.online/46799404188yk4xu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369322/normal_5ff57155e7ee7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5fe1299b74d8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5ff1047fdbca3.pdfIn PDF document text
    • http://banquepopulaire-fr.org/picsart_photo_studio_pro_apkquomm.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/UeQ0KRg/96057743789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_5fe58cdcba24e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389816/normal_5ffe4a2b95e44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fe2ae49c4c82.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/fosawef/94273480233.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/nukuxutojip.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/bulk_images_zig_firefox.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_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5312 bytes
SHA-256: 91e29fc5ea7a14feb986884587e3dc4af36ad079f16f8e95a35bdec56433396e
font_01_sfnt_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 10960 bytes
SHA-256: ab79d585b93f0a20623126ba50d7195b93c3220b423542b10751b0dea406263b