Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c46b815ab6a5a7…

MALICIOUS

PDF

70.6 KB Created: 2020-12-03 12:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 14c06da1957ada80f3c86636bc5f6d14 SHA-1: 27153e04bc12c8c349c96287161322fa237496bf SHA-256: d1c46b815ab6a5a7dcfe27894a338b87464441868c3d36fbfb07ae4262443855
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/wb?keyword=leave%20application%20form%20word%20template'. The document body, though heavily obfuscated, appears to contain text related to application forms, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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=leave%20application%20form%20word%20template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5fbac7884e502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_5fc7f1b1b5df8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5faa71360acb8.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/kobar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fadedosi/1074082169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219b97b5-abf0-448e-8287-5144aee7592f/teoria_de_la_administracion_henry_fayol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf7ad18e72e5fdb9c7f27/1606285243112/85186310384.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29253a3bf4b14abb3bccc/t/5fc4587a145a8629dc3b806e/1606703227526/el_salvador_bandera_significado.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f06b104edf1d7780fa74/t/5fc16347f81c9a2a0cd6349b/1606509385605/sanyo_fw50d36f_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9aa91f6-1c77-4cf7-9628-a9ea97557d77/mothers_who_cant_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6abdf9f-6b3f-4f07-92f0-fae1fb81dda0/rasigapekojof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439dddf5-cc96-44de-90ab-fb3b54d98f7b/luvokaxovupeneluvobafik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb3040f1034a5ca93bca/t/5fc81ce426a3037b432ee5f4/1606950118420/wujuraxamikenawafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9af4fe-202e-4018-83ec-795288193310/34130916915.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5D 5004 bytes
SHA-256: d63d4ab30766613df1fb847f07deb0f9d1dea537b8e22349a8aa2eb64cfce200
font_01_sfnt_off0000dd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD58 10036 bytes
SHA-256: d35bdd780b751c9e69548ce82b3034f717aa80120f2088f26b698beb0491fa56
font_02_sfnt_off0000ffa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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