Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e417df4eca55a9c…

MALICIOUS

PDF

66.4 KB Created: 2020-11-10 16:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6a81814df98f360e764941d901cab72 SHA-1: d86171f0332f80edfa76b9bdd1f75f4954ceb103 SHA-256: 0e417df4eca55a9c0cdf99224c8dbf19763f0bffaabba5f0624681af844e2600
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?keyword=fleeing+the+complex+menu+music PDF link annotation
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/gutekevenixobizoki.pdfIn PDF document text
    • https://lanufirosonez.weebly.com/uploads/1/3/4/7/134704233/fujujevupo_vazira_dejek.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/bixorisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_5fa1b6405ae63.pdfIn PDF document text
    • https://fexogobavube.weebly.com/uploads/1/3/4/6/134639764/7065422.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/jajex.pdfIn PDF document text
    • https://wegefaraza.weebly.com/uploads/1/3/4/7/134703567/c13496.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/a3c0cba3-0a8d-4e13-96ed-fd653ea47b7e/apk_free_fire_lite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac20383-d780-4f32-83cd-62afebfccb38/78142633112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca15b2f-0073-493c-bf77-5eaad76fb294/52839639342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92669a5-91e5-4980-b41d-c5c1af35cd2f/gutijunevozifogujoxagasal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f69b8ed5-b9ab-47fe-acca-e392de413ecc/project_cars_2_setup_guide.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_off0000bfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEE 5064 bytes
SHA-256: bffcca8b5cacb16148b9da2f78f260b98fd2e63b16d17faff86abf21926bdd7e
font_01_sfnt_off0000d117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 13972 bytes
SHA-256: 42cb74da04fc9cb4194e95ebe384752ae4d018864c0e98df6f42332a3c608ee8