Malicious PDF — malware analysis report

Static analysis result for SHA-256 501e07e806d7121b…

MALICIOUS

PDF

86.6 KB Created: 2020-11-17 17:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7f57cb89260fba383b7392625ef77157 SHA-1: 4977da5c2234e55b67876fc8cf6ff247a24a61ae SHA-256: 501e07e806d7121b100eec221a3f64c88e6364b920fa94f1c4585992ceb703b2
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains strings related to 'doc savage pdf francais' and the authoring application 'wkhtmltopdf', suggesting a lure document. The presence of embedded URLs and the link farm heuristic indicate the primary goal is to redirect the user to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffmen.ru/123?utm_term=doc+savage+pdf+francais In PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/xofemojefufef-mujadafa-wiwuloz-tizexux.pdfIn PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/fizogazokiwutut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5fb2f696838e9.pdfIn PDF document text
    • https://kufofena.weebly.com/uploads/1/3/4/5/134504524/20def42291a39b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5f95d48d2d825.pdfIn PDF document text
    • https://wovuxitijijigot.weebly.com/uploads/1/3/4/5/134524902/694005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5fad92f2f22c3.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/duwizom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f8b23ac1c976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_5fa9a9a1ced36.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/1864711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f9c09e2ab239.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/gowebabuxogiro/miller_spectrum_375_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/d_d_beyond_character_sheet_in_app.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/femeriporileroxofu.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_off00011564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 5348 bytes
SHA-256: 0ad7acab14309bb3a0bfea5bf1bae255059d4d620b2b156362f51563fcb73815
font_01_sfnt_off000127b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B8 11616 bytes
SHA-256: a4be47029aeb6519c2ee37e11e05eb7cf57bcb3d27e82e32ffa94506be7fe6a6

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