Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c6c07d534a3727…

MALICIOUS

PDF

65.0 KB Created: 2020-11-29 10:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8f538c8ac9d51b769c0e5897e62c4d9a SHA-1: 8d73f3c95b812de102738607c26b01af86fb1ff1 SHA-256: 67c6c07d534a3727bd3c01e6089afebee8e809538bfe5b54a20934b8c88ef457
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/aws?utm_term=gout+diet+guidelines+pdf In PDF document text
    • https://kusudojisopev.weebly.com/uploads/1/3/4/7/134774064/3a8a5ba2b666655.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/gajaxijufikim_pesizuxewimoloj_wuzegoturosojug.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/gagiroteb.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/japaturo_nomado_zusakovafib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5fb4e8cf72b6b.pdfIn PDF document text
    • https://sujegido.weebly.com/uploads/1/3/4/6/134695044/3f43acd89ce26c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_5fa142c6c32bb.pdfIn PDF document text
    • https://jerunozitotab.weebly.com/uploads/1/3/4/3/134310055/02970ce287401.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/b3b2ec4e-fdf9-4597-88ee-1cd12bb1a8d8/22398597131.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/fb_messenger_app_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bapogoj.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_off0000c3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B2 4936 bytes
SHA-256: e473d53d1a3d8bae369a829586a64aaa3909d359c22bc294526852bfa03679ce
font_01_sfnt_off0000d49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49E 10316 bytes
SHA-256: 788e155fab4b652ca978a1b8fc4421a01b208767e639777cbbd11eef82847039