Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e67bb091dd97e3…

MALICIOUS

PDF

65.9 KB Created: 2020-11-11 01:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 631d1a02d7e2d064467d8dc6c3f8a5c3 SHA-1: 7eb54f28df005f90995bf38b6d2608808e05e1bf SHA-256: c4e67bb091dd97e37cf38fd7b7653379b3dac871b942ae25aaf4ccb20edf7fc8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/aws?keyword=city+mini+double+stroller+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_5f9cd1b1b3e68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1029a8c-0db5-4f13-9368-44b3d660d883/7621946037.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/4828589879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba2376e-c797-4b53-8827-85dad2b45caa/chinese_scooters_haynes_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce2ed41-da93-474a-806b-2112dda6ed4b/90410892397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b16e35c-ecae-4864-bafb-b92148e9ee03/kefaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/study_bible_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/concrete_structure_properties_and_materials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1399b30-09d5-4de4-92f4-cc51d77121da/89440215468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec428660-5129-4da2-967c-9228406d959b/zatusebuferimiridibaw.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_off0000c6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 5116 bytes
SHA-256: dfac31a3a7d47cbbc05765351e2c29fd9dba2c19cf3c159f7ea96b6b6291bdf9
font_01_sfnt_off0000d7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F5 10280 bytes
SHA-256: 65cd79a0b696ec3f59ca8a467518c49e8d75c5b5a514ea55a655f3d7754bb673