Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd67816a2b779df6…

MALICIOUS

PDF

72.0 KB Created: 2020-12-22 21:32:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c7cf237a46203ff43677eebcfd164693 SHA-1: d1a7963a1a14d15e8420b24a4ce4822656a33a7f SHA-256: bd67816a2b779df621a5181b1571fbf5723a3801a6f89c7a08c4ec6efa2d090e
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL points to a known malicious domain, indicating a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?utm_term=define+functional+group+chemguide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_5fa5804e93bd7.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/gezizefefififa/simple_retirement_letter_of_resignation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/bojiwudadogizasitugol.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/presente_perfecto_simple_en_ingles_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f697462d-28df-4ee4-a135-31f3c79baa86/84416410832.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/mebejeseteg.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/zatuwoker.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/classical_dance_of_india_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/atom_molecules_and_compounds_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/natoxopewutuduwowajeli.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_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 5272 bytes
SHA-256: 41d6a8821e8f0450708ddda10e835339b0759d0e8667ad95930a5b9b01e41898
font_01_sfnt_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 11184 bytes
SHA-256: 2e10d52a7026fe2b76187d964078ec933401025b1ed7d288d09d60bb3ce08cca
font_02_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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