Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c20605837e0c561…

MALICIOUS

PDF

66.1 KB Created: 2020-12-16 18:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: edf72c1ced450219a1cf50633571d733 SHA-1: 78463d3a7ed367e78b1b28d5bbe17a7470a036b6 SHA-256: 7c20605837e0c561ec7e4f1a4cfd46ac4b211d58e43bcdb400897297464dbbf0
254 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
  • 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.
  • 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.
  • 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/123?utm_term=rocketeer+helmet+master+replicas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4494147/normal_5fd2ebea01a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488092/normal_5fbb4c2caa52d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5f9cbcdc37b6f.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/jixefupixataxij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5fa429f69a698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_5fd0f1a34b310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5fa3a960e7ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5fd92fd76b68e.pdfIn PDF document text
    • https://tizonitiwu.weebly.com/uploads/1/3/4/7/134734793/vuloze.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/6f5e0ca7-79e7-4dac-8ad7-8b5618e2e3c3/ingilizce_altyazl_film_indirme_siteleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a14ed33-5f1c-43ec-b8b6-152b16066091/tukose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98216650-5baf-4660-a97c-ad5f9cdaf114/oracion_a_los_angeles_y_arcangeles_para_la_salud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe10092dd96f5918b5f366/1606291465857/94726122773.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5b088c99b6d37a76c18/t/5fc79d2b0791337046eaba48/1606917434551/3906040967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7116c058-3e22-4062-b3fe-e6582227bbfb/coaster_town_wiki.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_off0000c607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC607 5244 bytes
SHA-256: d45919757c0ae1c65b09e1971280da1aebbc578f76ec1890b4ee23198d89464a
font_01_sfnt_off0000d7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B3 10548 bytes
SHA-256: 01841246f99beb2ca86f98814707f5fda60e2f761603134f340ba9fb4f3cdadf

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