Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b0289f5e2b69d2…

MALICIOUS

PDF

68.5 KB Created: 2020-12-05 19:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 70e08f4d3534032fdca958086850a27a SHA-1: 32a3550a03c8b2e5efbfc0c0c0294f8538e4b133 SHA-256: 60b0289f5e2b69d2c889ca382301c8bb6a213c8641754173913a4415e95b9ea5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=without+feathers+woody+allen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5f9bd4b4c18c9.pdfIn PDF document text
    • https://delezopo.weebly.com/uploads/1/3/4/6/134600584/1840796.pdfIn PDF document text
    • https://bovozamebezunun.weebly.com/uploads/1/3/4/7/134701649/vatirupini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f90d12470b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5f90b15293aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f87cb22b09b6.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fa74d1f321f0.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/2288239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5fb321f3d7e70.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/rokuwapesu/relubo.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/survivor_season_7_episode_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b53eba-9dcd-47b1-a5c0-10d28ad5ed92/zarosavuniwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d766dba0-7b51-48ba-a97b-9fdc486dbc40/70043761144.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_off0000cf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 5200 bytes
SHA-256: 6e2010d2007b9c891a56e4aaee8b6b8bd16084ad119db4b4c8509971d0453048
font_01_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 10804 bytes
SHA-256: e86623d423114c1800e10fc4703d4280e39573f602603d5f69bde4e30fb29a8e

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