Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c0d54222ea767b…

MALICIOUS

PDF

69.3 KB Created: 2020-12-19 19:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 32cb0c236654ab2be9f5a8165cf1b878 SHA-1: edfc874edb71dc6ca49d11df69ad722e94eeb9ce SHA-256: 44c0d54222ea767b06b73e87214f8c74000eac03d20e672fb1fd013956b99172
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 link farm. The primary URL observed is 'https://trafffi.ru/aws?utm_term=bianca+bonnie+song', which is likely used to direct users to malicious or SEO-manipulated content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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/aws?utm_term=bianca+bonnie+song PDF link annotation
    • https://noxurujoba.weebly.com/uploads/1/3/4/3/134384046/24b734.pdfIn PDF document text
    • https://maviruwatibifiw.weebly.com/uploads/1/3/4/4/134490209/6086264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460230/normal_5fb877c21da3c.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/gujafajunejofajemomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f92c173f1f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fa06933ad3ea.pdfIn PDF document text
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/8da2cecaf979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fdb531e59b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f90e81314d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465250/normal_5fab62e3a6619.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://static1.squarespace.com/static/5fbfd3c824b06a7eb3f8da22/t/5fc14dc89d79364840bdcf92/1606503880910/26887398751.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65200ea4a794d566a2ee3/t/5fd1589cd97b572b89caa1f5/1607555229918/rulefunuduponiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90775085-9fc9-4d50-97d1-25cd2b8b92f7/58308437130.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC597 4736 bytes
SHA-256: 59f9e0cf47dc846fe6ebd4c691dda54cf2dc6391340a1c3f2f6e5df7a16cb330
font_01_sfnt_off0000d5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 10868 bytes
SHA-256: 68b240524a88eed3c431d85686ccc8244f8bb2c0da79c766b13c141ce5483709
font_02_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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