Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ff93788b935240…

MALICIOUS

PDF

67.5 KB Created: 2020-11-28 00:34:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ffa96eee4a19733b1b52eea8e1fb1176 SHA-1: e8a5c564d0c9ece46113edb83c45c7d9468a7cd6 SHA-256: 79ff93788b935240629f9fae01d0db60d992cc5afa2467052f1f368a4bfe83c3
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent URL being https://traffnew.ru/strik?utm_term=baba+yaga+john+wick. This suggests an attempt to redirect users to potentially malicious content or phishing sites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=baba+yaga+john+wick PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fbf69bda4b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_5fb47cdbdaeb0.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/2842d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5fadbafba18a3.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/a3d0abe65de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f8b20834a186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f9107890eb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_5fbf86095b2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_5fbf58b56533b.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/xifigabamux/novarodiguzaxaxibaleto.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/89113899386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f06d37d-e0d4-4a68-a1a9-f16688c7d881/dd_national_dd1.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_off0000c928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC928 5276 bytes
SHA-256: b18b2467384ba6053e5477fd2305570769349dcef8a243ec6f16e7b98ef64129
font_01_sfnt_off0000db46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB46 10892 bytes
SHA-256: 12f6547863fdc837208691e896ffbacec034b2fcdb4ce10139c817bd8bfe8c01

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