Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f5718644fbd7e3…

MALICIOUS

PDF

88.8 KB Created: 2020-11-21 15:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10597870b1fe35960468d2f8d3e2c298 SHA-1: 5d8ef5c483981a853ead0f1fc0797ac550f987e0 SHA-256: 03f5718644fbd7e35018734c0c920b6ad425e832e0acfa45d368a12378c8348e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL being 'https://traffine.ru/123?utm_term=telescoping+fishing+rod+academy'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded links suggests an attempt to redirect users to potentially malicious sites, aligning with phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=telescoping+fishing+rod+academy
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5f9ca27446b70.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f8a5f74c0ba4.pdf
    • https://cdn-cms.f-static.net/uploads/4463529/normal_5fa41efaab490.pdf
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/josupupenoseta.pdf
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5fa6ce705ab4c.pdf
    • https://bubizepanawip.weebly.com/uploads/1/3/4/4/134480996/971885fc77b9292.pdf
    • https://zoparojo.weebly.com/uploads/1/3/4/7/134762662/876639.pdf
    • https://bikipejuroninoj.weebly.com/uploads/1/3/4/4/134448394/8cf7c981068479a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cf74a5bb-9502-4875-8c26-8e53dd7eb77f/99271364238.pdf
    • https://uploads.strikinglycdn.com/files/d7814c2e-4e14-4c1c-934c-64a6281344a1/yamaha_mg16xu_driver.pdf
    • https://uploads.strikinglycdn.com/files/bda17a7f-d4a2-44ef-a7cc-05ee2eee86eb/vuzetepidudovefazulogugeb.pdf
    • https://uploads.strikinglycdn.com/files/db3921e6-8d49-431d-afbd-3684175b05e5/fokegufekurafum.pdf
    • https://s3.amazonaws.com/mijedusovineti/internet_of_things_examples.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e33.bin
69ed91a02acf304dc9cc83c421937f065f9dcdb566ed2017e6cfe999f3bb0b7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 5620 bytes
font_01_sfnt_off0001312d.bin
d0c892369675b3cfcabc28267c09eb489b2722d11cd1a5bc5def79b50d448fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 10840 bytes