Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee62a1977bd4916…

MALICIOUS

PDF

78.0 KB Created: 2020-12-24 13:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ff16042691da4f2516a7a9406c7d1016 SHA-1: 0c7dd0cda3a6cb278495ff2f2d14f56f11fc2299 SHA-256: cee62a1977bd4916658a3d0c93a7ec795fe495069a8e0fe67ce403755ba17291
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with one identified as a known malicious redirector. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these links rather than convey information.

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/123?utm_term=hooray+for+hollywood+barbie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_5fbe0a0396c6a.pdfIn PDF document text
    • https://fejaxipanegis.weebly.com/uploads/1/3/2/7/132712099/babudamu_kolekusakoxopok_kowodujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fb4a3ffb2273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f952564e51ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5fa3b94b7e253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5f97851cea43f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_5faa23c3f31c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5fd6727b4b57a.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/VjhijdF/ahlta-_t_computer_based_training.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5fd275373fa8c.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/bdc7b725-b8d7-4cab-8a3a-cef4d4c3aacf/tobuwasolosa.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_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 5112 bytes
SHA-256: 05e5c4df622a16f9518a343e04518316817af2af87f2a9991e499e3a000ad520
font_01_sfnt_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 11208 bytes
SHA-256: ec6fc772093784c9652e13cd2650ed9b9cc04623f328907d58b35c6119f98165

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