Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dcd7056adc1a45…

MALICIOUS

PDF

66.6 KB Created: 2020-11-19 04:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 04e566842d0d95deaaa66f762bb3f6df SHA-1: 1d7004df535dff7b06eb996e96cc66da3bf03b4d SHA-256: 82dcd7056adc1a459dd85f0426b96e5103150bac1393ff2fb4f243742f1e0c52
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafffi.ru', likely intended to trick the user into downloading a payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the malware detection strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=dmv+ct+manual+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5f99d5f3a5427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_5f9e2e4d3119e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_5fa22cf188692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_5faab5487330d.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/cded0fc0-1f82-4d97-b904-00e323f52462/xalam.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/90531047351.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/high_performance_cluster_computing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1849c419-b7e6-405b-b443-66305a15139d/14889595069.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/99619528827.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/butorovim.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/biuret_test_for_protein_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/rawepezorijomu.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_off0000c9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C3 4960 bytes
SHA-256: d93b5260736be89abed21bb9eebf6e0ff61c8404c64973d3e2862b3a630b9dab
font_01_sfnt_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 10236 bytes
SHA-256: 2357fbc90200b8a29bb7cfc97e47d0cb4517b56f58b821ce18cf8302ed8cdc32