Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d2c00e57b5e630…

MALICIOUS

PDF

92.2 KB Created: 2020-12-24 14:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5e8f172c0fbcaeaf0d2f200de5041513 SHA-1: 2a288fdff804719cd6cde88ca9719fd61cbb892c SHA-256: 41d2c00e57b5e630d8bcb35b9e93f6855ec9f80dd1d795430ef9c7bb75943bed
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=escape+the+prison+walkthrough+game In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fcf344fd7092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fcea9c2421e5.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/MPuAhex/remipunefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f8a6058f0b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_5f9e7efeeb018.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/d8ca2c84-9811-4f61-abfa-c3b01c819faf/74736686563.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/minecraft_code_generator_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa952295-28ea-423f-bc42-da6112b237d9/sisug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8009a41-f16b-4305-9323-44d6d2e060d3/81084467588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257af330-6fef-483a-8b93-19edc3e71b17/jukozowisilem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a5037d-3da7-4d8c-8176-745a187e840a/57998659061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36538111-3e6d-4bb0-8e2c-9a73b85249d8/62222166423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7317cd21-d6c0-42e0-8e7c-d25a9eecc2b3/58940788053.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/69560640546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2c7baf-a04c-4d09-b06c-be9fc4cc7c14/bifazuwo.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_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 5460 bytes
SHA-256: 5602af6daf721427a7245469eeae4e4b70823ae58d66fef88d573d5a4eba559f
font_01_sfnt_off00013f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F23 10612 bytes
SHA-256: 7944a87a6a8ad6b7d9fe60b63aa50b17e16984539775a3c59356f1682b2ba73f

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