Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a01593c077a0a6…

MALICIOUS

PDF

61.9 KB Created: 2020-11-24 23:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d5a03d5552212e2c8065515a8e111d84 SHA-1: b0fba51cc0691623fb13c45d2d7df10822279a72 SHA-256: 84a01593c077a0a602c15e359a6bbd13ce552ceb35c85e7d90a401463b048459
186 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 indicating a high probability of malware. The file contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm. One of the extracted URLs, 'https://trafffi.ru/123?utm_term=mule+yard+truck', is particularly suspicious and likely leads to a malicious payload or phishing page. No scripts were extracted, but the overall structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=mule+yard+truck PDF link annotation
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/dbf724c.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/ac8c8a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5fa37a08f33e5.pdfIn PDF document text
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/3170759.pdfIn PDF document text
    • https://dugilosokufaku.weebly.com/uploads/1/3/4/6/134610324/937f26dbc1.pdfIn PDF document text
    • https://kalokiran.weebly.com/uploads/1/3/4/6/134632324/4447082.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/mupukesunobaga/watching_wrestling_24.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce2e7d2-4ce2-4f32-b12d-a3f0e9ab65f5/tebaxogag.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/middle_school_tech_ed_projects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5efd93c-30e1-4fe0-a99d-c88ce7483898/11619689686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bf0665-b2c5-412e-af24-c46aeb1e2d8b/32196119100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5dc3ba-292c-49cd-b490-f4502db96776/88817345696.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_off0000b4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CE 4924 bytes
SHA-256: 3949b9917638cd1cc116117d290d2de40332f4f451e80176adca0d6f295ff762
font_01_sfnt_off0000c5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B2 11312 bytes
SHA-256: f60b619a1a5e4bfe154ab8e5150f336e50a8a7f9d3377140325cc95c5022759f

Open this report in the interactive analyzer, or submit your own file for analysis.