Malicious PDF — malware analysis report

Static analysis result for SHA-256 1659ef7bbae384d9…

MALICIOUS

PDF

71.9 KB Created: 2021-02-19 07:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 546783b38ba0dcea944773daf3bef466 SHA-1: 53af4ce5eb39f2ca4de9b8a94dc1a2b4e60b4957 SHA-256: 1659ef7bbae384d9568e7813749587f532912b0a99dd97bcc061f6ec220ab282
136 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
  • 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://jacksth.ru/wix?keyword=how+to+dump+wii+games+on+wii+u PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371004/normal_6006cb793123f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488135/normal_5ff43557aff6b.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/N7VqheB/222201892.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/5g7LLij/serial_bluetooth_terminal_raspberry_pi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_6029334700533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fe69b05a7121.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/hdhwrjd/zepovizururoze.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/1jihep9/ccm_02_ice_hockey_skates.pdfIn PDF document text
    • http://tisigetid.iblogger.org/composite_materials_text_book.pdfIn PDF document text
    • http://wadopipojadali.iblogger.org/89812005920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_602f24ed536d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemiwojo.epizy.com/light_sheet_fluorescence_microscopy_resolution.pdfIn PDF document text
    • http://kunibenurupamiv.rf.gd/67660939312.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_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 5204 bytes
SHA-256: dd975eca5fe3fac603fa34b44e5eaf093777c91349ade283f07706832c5b4dad
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10120 bytes
SHA-256: 851de4136dae736b59f30859c08ab2b64b9b053d83851c0beeee89e4c4ea5489