Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97bbd4794d7e764…

MALICIOUS

PDF

74.3 KB Created: 2020-11-16 19:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 126624e515b04a628383d319f628cc5a SHA-1: b14e42d4f0b3b97590f77fc61591bcbbdd1a8ef1 SHA-256: f97bbd4794d7e764e59ac51013765dadbac841d6f70ca0794c2221d0743bd1b1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=leviathan+underbelly+code+reddit In PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/48fccedd.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/10fe2ead0b53.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/jipowumat/43598701592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79a9294-c2d1-4e19-abb9-b0be152551ad/fortress_phantom_gravity_metal_detector_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f03528-2f2c-47bd-b837-fd8a660de709/36688641547.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/vapevegin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1d2ac8-3e95-4a36-8a06-faea82999325/chemistry_chapter_3_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/gumazutirajoterupenavesiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ca8684-6ef8-4440-aae6-3b8028cbe2c2/70914635728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4029bfdb-4881-47de-83db-09e4da282dd3/zalinevoxitaluxaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e58d54a-e1ac-412c-8a7c-f3041d8083dc/rokaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 5092 bytes
SHA-256: 2689cafd99108fe2ac9adcead7e1e8e820c756f77b638ce31f2507f1ea2b2687
font_01_sfnt_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 10852 bytes
SHA-256: e30e34be9fc3cbf67742709c34ebbe21e52c2550764e4dff3bdb313384262c86
font_02_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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