Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1c83dc10642c85…

MALICIOUS

PDF

67.8 KB Created: 2020-11-10 23:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f55ee83f6940579f13c9837f323a4c64 SHA-1: 16a7f68e7c5e27697f3620b8ca9ba435e83172d0 SHA-256: 5c1c83dc10642c8591b885c281932f64f127e0ca4410ef1ff01e7d0d9ad0de1a
156 Risk Score

Malware Insights

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

The PDF file contains embedded links and a document body that suggests it is a lure for a trophy guide. Heuristics indicate a PDF link farm and ClamAV detection as Pdf.Phishing.Trojan. The presence of external URIs, particularly the one pointing to trafficel.ru, suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/strik?keyword=dragon+age+2+trophy+guide PDF link annotation
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/8400781.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/feluvutefu_dadaso_kiwumewi.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/084689b7-81e4-4940-aa93-b1c6063d11b6/56842651797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc3eed7-0e91-4479-a24e-3d66b68c036f/34638523617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea13e475-364a-458f-af0d-86d64b953874/geberimifuvonirabof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8433c39-8120-4ab7-b250-4068de6440d7/secondary_two_mathematics_an_integrated_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00cb6f0-fd1b-40f9-9f91-e5a79c98dffd/50463942278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3304e981-af19-4beb-bbf0-7e21dc39d84f/34329057163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed40f72d-e7e0-45fc-a7ec-b79be5df440d/rufusazajosidadipitanulub.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/16103364900.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/fannin_county_texas_court_records_online.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_off0000cd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2E 5244 bytes
SHA-256: 1de9b0941427b6ba00834977f376544e6999674336bfd991cc4c197a7f6d61e8
font_01_sfnt_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 10564 bytes
SHA-256: 39f7409a2a6d3895e5a3e855fa946e0a0527265523c592d627b29643820953cd

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