Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f2791c1a1d72d9…

MALICIOUS

PDF

72.0 KB Created: 2020-12-17 11:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aa5f523409fdc98b7a3216536387afcf SHA-1: 965f2593cd4cd6e8155f6ca0fb1ab8502afcdfc7 SHA-256: c2f2791c1a1d72d9aa4842fa1bf81f179f192439bc85ab7b5a54eb3e05eb53a6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of numerous links suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=adidas+marketing+mix+caso+practico In PDF document text
    • https://static.s123-cdn-static.com/uploads/4473654/normal_5fcf585f3d75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f9b42f7dbb2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5fbdfd3abc170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_5fa80f8b36893.pdfIn PDF document text
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/f0ee387e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_5fd7a0fbcdd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5fd74ef328730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_5f8e6353b7d67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5fcc7ad8a30a8.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/bibejovixapis/bc_road_map.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/what_motherboard_works_with_ryzen_5_2600.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_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 5484 bytes
SHA-256: 7d2fd8cf512a5ad07c42ffd151380aa33fccd6a0d90e944670208146d0124fec
font_01_sfnt_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 10960 bytes
SHA-256: 051d955e69002d930c35f09058a21c8155acfa0c04c7313eb07041933ed0c251

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