Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7131def532d1291…

MALICIOUS

PDF

62.0 KB Created: 2020-12-30 14:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 50c8fb3079f12368259c026f0133a71f SHA-1: 97ddccf3c617b41004d3539fdf75c7b1a3193645 SHA-256: f7131def532d1291da69401fcc7b65b1bbf94eca171b131e6314f95071785be8
244 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/wb?keyword=red%203d%20heart%20puzzle In PDF document text
    • https://nidikibadut.weebly.com/uploads/1/3/1/4/131453007/rititemilenejeb.pdfIn PDF document text
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/8151032.pdfIn PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/tuzig.pdfIn PDF document text
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/7590919.pdfIn PDF document text
    • https://xivamiwilazux.weebly.com/uploads/1/3/4/7/134742933/notoxepe_lifakapati_fexokam_bobekaxelowezu.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/9601124.pdfIn PDF document text
    • https://lukizodik.weebly.com/uploads/1/3/4/4/134458766/zixisunibot.pdfIn PDF document text
    • https://wufowidujexo.weebly.com/uploads/1/3/5/2/135293423/126881a124.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/gavexilatuvitaz/delorejifin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51950cd-b2e7-4e54-8422-a0326ee78cbb/13888528937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e605966e-e29b-49b5-9f00-93d26d5202c6/51810796465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b993b9d-3f87-4d5e-81ac-04bc17760cc9/61491755374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f3e1a3-c8cb-49af-81c3-f1c81041e622/juvorovoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c01cee-f7d9-4c4e-b20d-b2bdece762b7/31938630481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec50434e-a5f8-4d79-bc95-3f744f48fbe1/new_wifey_videos.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_off0000b56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56F 5092 bytes
SHA-256: d1112d0a3476befc2162d44d506ee96217a9c833d822efe11acc36b7b14e53cc
font_01_sfnt_off0000c6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C9 10368 bytes
SHA-256: c12084d10eccd3b701fa29f0855a09bedb5cdb476c53db429e0c561aa15e44f1

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