Malicious PDF — malware analysis report

Static analysis result for SHA-256 90696f44cda31bd8…

MALICIOUS

PDF

69.4 KB Created: 2021-03-03 14:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 601cd046d0ab58eb953fe68e20478d89 SHA-1: 934c046e7030d362c5ba494e64a93f1bce8e8953 SHA-256: 90696f44cda31bd8c7bfa45708b97df2e6e6ff8113f4eb09ebb6e55d2aee849f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=reset+tcp+ip+stack+windows+7+command+prompt PDF link annotation
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/wowajut_gugugul_pebirisusavan.pdfIn PDF document text
    • http://netezasodi.22web.org/zonujovabenimamagixu.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/vojitadizovi-wugewonejod-luleses-nitizojufi.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/nikegebonilifovakanamuxu.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/tazopaju/fabuzeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/intcos2x_sin_xcos_x2dx_is_equal_to.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/what_is_conventions_in_writing_in_spanish.pdfIn PDF document text
    • http://lefumes.rf.gd/fakuletutelabivoxajezirer.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/jebowi.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/commando_behind_enemy_lines_2_android_gameplay.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/97021276847.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_off0000d318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD318 5432 bytes
SHA-256: e079e5a638bd27a295c603b5a33e84f4b78814dd7d61c38fd96e6710f0edbf74
font_01_sfnt_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 10264 bytes
SHA-256: 826d78718ac02ef0e67954877be22f1fb20f50f3252c5739563c972ebe278ce4