Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e405aa00ceb2ee…

MALICIOUS

PDF

84.6 KB Created: 2020-12-28 16:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9985cf755f74cb0de4c820051bb7a7db SHA-1: 14e7353b0ea324447002e9ce8af42358a2ff4c84 SHA-256: 15e405aa00ceb2ee70eb110a3d302c166fe9c4ba36eb15bdcdbba1d2093078f5
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, primarily through its embedded links. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to known malicious redirector infrastructure, specifically 'https://traffmen.ru/strik?utm_term=dibal+h+ester'. Additionally, the 'PDF_SEO_LINK_FARM' heuristic reveals a large number of external PDF links, suggesting a coordinated effort to distribute malicious content or engage in phishing. The ML classifier and ClamAV detection further support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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/strik?utm_term=dibal+h+ester In PDF document text
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/3219871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_5f9a9a45693ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f96ea47b3430.pdfIn PDF document text
    • https://wavixozuxukoreg.weebly.com/uploads/1/3/1/3/131380445/kutuledafekogogipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ebb906e8-b02e-48f2-9e30-2bfdeb8a6f00/fawava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d0e062-ea85-4e4c-b583-f256945d7bc9/gikixevafuxilupaginima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3d8228-e6b1-4148-8a69-601a656b9e16/whos_dated_who.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0864ccb-aa02-4d5b-a822-fe467401290c/62237522478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9353d598-a7ad-49b9-982d-2546fecb1cbf/sekiberirudazup.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 3028 bytes
SHA-256: a8bb295adce06666852798224f8c17cf63d4c16f7697ae4b42c723da0a07d689
font_01_sfnt_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 4484 bytes
SHA-256: d876069feacae1ff63fbd91b1dc61960a63819be487c1c261ba7d12ff86dcab9
font_02_sfnt_off0000fa56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA56 11844 bytes
SHA-256: 6c01108b47ac2902e8e12103ac2e3475e2ffbdb8ffc8a506cece7c46888c85ce
font_03_sfnt_off000122c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C9 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_04_sfnt_off00013761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13761 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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