Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f3f5ab7b9c0f62…

MALICIOUS

PDF

67.7 KB Created: 2020-11-25 21:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6b06fe1bd582042d56043309753d03c6 SHA-1: 183e6d2af19544873cfdb8c38943b4ba4422c1bf SHA-256: d4f3f5ab7b9c0f62975d9be51eb914b25e2ded0d7e3199753ea17f3c83eb254e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to 'trafffi.ru', suggesting it's part of a link farm or phishing campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards it being used to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://trafffi.ru/strik?utm_term=mekong+cafe+2+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f873213d6f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5fac1d37de125.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/2341066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f92561298d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f874b455823c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5f8e54bd260cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5fa31161aeffa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5faeb0ce6d853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f93d1661d9db.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/nalifij/56771130744.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/suta_request_form_army_national_guard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f847e667-4b60-479e-820b-fd58322fd73d/pesafededawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a08c60-f26c-404a-b7f4-e61072140597/35922691497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94915115-2701-4940-9f77-d29e826c7b27/le_littoral_franais_ce2.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_off0000cc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC74 5096 bytes
SHA-256: f7afc3ed67b21796eee4ba9ffd2ff592417dfdafb82f7a4536b43e46badff81c
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 10936 bytes
SHA-256: af891ae723753e8b83d73be43fe9169bf9e9d94fc85fed6ad66ba24ff6117e04

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