Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e2e02c26f33624…

MALICIOUS

PDF

70.2 KB Created: 2020-11-26 16:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 301da963ddec03e1256eeb2ec288f30f SHA-1: 93cdd63cf9a80f807546a9db91ced3a7efcf8d01 SHA-256: 67e2e02c26f336248014e6637665dac024c2542046b561e8d13a9d1110997210
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

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://gettraff.ru/strik?utm_term=warlock+5e+archfey+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5f9b459b62752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f97299626450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5f9470aced406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5fa299fd9936a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5fb9d69532447.pdfIn PDF document text
    • https://vaxeratomox.weebly.com/uploads/1/3/4/3/134397216/zopesugepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5f9d56175c10e.pdfIn PDF document text
    • https://morupataniseb.weebly.com/uploads/1/3/4/5/134502176/fijufemapan.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/fd4c6c3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fa58b4f2a3b4.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/guvovigo/novejulopatimovumazukojav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43402f07-a75f-41c0-bf84-6c8d181f860d/65705845285.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_off0000d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD224 5408 bytes
SHA-256: c240ab479369b4585877739b0133cff14facbd0d5274c5d89c1a70bfa0a8ab81
font_01_sfnt_off0000e4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 12004 bytes
SHA-256: 57421d69d7b7a80ba04cb8a3a268567bc9bbd67ac44788dcb063cfad72b17c78

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