Malicious PDF — malware analysis report

Static analysis result for SHA-256 23db4aac0947722b…

MALICIOUS

PDF

66.2 KB Created: 2020-11-25 13:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 54bd05b946f4e8caf6aa0df63a18502e SHA-1: d4eec07df5b5b54befe20239aca8c309e7298c06 SHA-256: 23db4aac0947722bd3eb62e1add5d55f6d51f14c64650dbf5b66733788b77c4e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URLs, 'https://trafffe.ru/strik?utm_term=finding+haleen+pathfinder', is flagged as suspicious. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely related to phishing or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=finding+haleen+pathfinder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446646/normal_5f9f3b47cd2ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f8a1be6242fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_5fb6d0b214eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_5faefc0f8fb21.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/dopijimevuloko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5f943a16e517c.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/1ed88ebe-f753-47a3-9415-59637a114a53/85112965142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1364f5d-6146-43a2-81ff-82f881cf041d/costco_tresanti_adjustable_height_desk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fba7da2-9897-4dd8-9ec9-8d6ff3371a2f/vusuxegiden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78cb1578-636c-4f66-9902-3059dfdd6181/sajomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1fb4de4-693f-4638-8565-8994e23286f2/34199278101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5afb230-4976-49f8-bb28-9ea372b43d81/sapibuxekonixizekomupan.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_off0000c301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC301 5080 bytes
SHA-256: a891026249a4d489785e83eab3313f47f30329395eef303f7fc50420f915fd7d
font_01_sfnt_off0000d44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44F 11360 bytes
SHA-256: 3ee8a1c9215ad8dcb54a766e0d9a4224a52d94d2e1d494ddaf4e1a6f40eb0540

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