Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b93c3390e9c0a3a…

MALICIOUS

PDF

67.1 KB Created: 2020-12-16 22:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 061018c514574ae733440b8ab7b03d80 SHA-1: 237036fea41c144630894ab5f2c78b15001db834 SHA-256: 2b93c3390e9c0a3a397ab437ef38732d0234274f3bd78a02f9cc4e85d7be3415
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'traffmen.ru'. Another critical heuristic indicates a PDF link farm, with 's3.amazonaws.com/ronatiduzoxij/tunuke.pdf' being the first identified URL. The ML classifier and ClamAV detection strongly support a malicious classification, likely for phishing or malware distribution.

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://traffmen.ru/123?utm_term=phonetic+spelling+of+my+name In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5fa5e5c6eae37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_5f9dabaff0d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fa4db0bb763d.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/f60ffba68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_5fb73059d9b2e.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/ronatiduzoxij/tunuke.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wukuvowenutupabugiguduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59bc39c4-302e-4b88-93ce-0addf66026c4/positive_and_negative_space_art_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167109e0-6958-4ef8-a240-c2bd29a58421/migureligol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5208abda9c57a97d98c8e/t/5fcf6268ba7003536eaa46a1/1607426665745/pezaxuboza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3be65b-026a-4573-920f-082b65721663/tamoru.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_off0000c7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F9 5436 bytes
SHA-256: d27272205d24db0e49fea2ec8ef14764973eee47c5d51046ecf2e7699aabb2a9
font_01_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 10980 bytes
SHA-256: 0229a06c63bf992d0c2b36fd01b430555813c5cf34225878df1b9b07c575b0c3

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