Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1a3b308733a673…

MALICIOUS

PDF

70.1 KB Created: 2020-11-25 21:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c0a07fcbb303030964632b14115e5860 SHA-1: 03b15c83e8883f8b7cb5cd700c04b5563f09255d SHA-256: 2f1a3b308733a673d4ed453aa5cc1d55924348da9d45c88342b2ebc31f8776df
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm designed to direct users to potentially malicious websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to distribute or phish via these external resources.

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
  • 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://traffset.ru/strik?utm_term=2+stage+propane+regulator+home+depot PDF link annotation
    • https://komomagifagele.weebly.com/uploads/1/3/4/7/134705279/8759147.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/7237958.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/90dddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5fa4399e3abec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5fa242c5d553e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447086/normal_5faf41bc39d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5f95fec256ce0.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/xizinedibogadiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fbd662ba6b52.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/sonutopexaramuf/robert_bigelow_mt_wilson_ranch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bc35f1-5335-467d-8621-81b98db20282/wogopavepewakalenana.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/48433315160.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/google_chrome_store.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_off0000d2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B2 5408 bytes
SHA-256: 9a3df9d585299ee114cbce5d2856b2eb0c83a0485369f9d2733f06bc74d0d9e5
font_01_sfnt_off0000e4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 11468 bytes
SHA-256: 96f947bb812379f24153c3e2cbe8e4931d7da6c99c85f7e3849b5ed72bf034aa

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