Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e79b0391a790f97…

MALICIOUS

PDF

69.2 KB Created: 2020-12-20 00:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b269d42c6fa735d448fc6d3981f10c69 SHA-1: c82b5a3e741b00be0a21f40fbfa0cc072cc4a8a3 SHA-256: 5e79b0391a790f97ec9bdea9d7255d6848977691d93b1811e62f1ff787085c2c
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to '20th wedding anniversary gifts'. The presence of many external links, including one to 'trafffi.ru', indicates an attempt to redirect users to potentially malicious websites 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
  • 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/strik?utm_term=20th+wedding+anniversary+gifts+for+couples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f95bec7bd6bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_5fa4897d50485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fa4d5e4a81c3.pdfIn PDF document text
    • https://nekamijej.weebly.com/uploads/1/3/4/6/134633096/3515038.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/buputopipesok-vogagisereri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcd7ae43daad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcb8f3722b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f91898f24bc1.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/6311574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8a791db396a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3128413-04d5-46d8-81a0-7e9957628eb2/nuwupijezobogavojogatowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1183d129-6483-40ee-bf5d-6f7ff00b4d8e/64745318437.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/43719394683.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/besharam_full_movie_free_mp4.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_off0000cf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0C 5852 bytes
SHA-256: a322417a9e00932eeada523d2c470f03bcaad5fd4f8da9d12af6d0d8743fc771
font_01_sfnt_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 11052 bytes
SHA-256: 6306aca81937af18ffe3a68eda212fd980f8f25a24b636ea7bccea399f44c8ea

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