Malicious PDF — malware analysis report

Static analysis result for SHA-256 83217628f7c63daf…

MALICIOUS

PDF

73.7 KB Created: 2020-11-23 09:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 43c9aaf8baa98376171fd684c4937f38 SHA-1: 4571742a4da94326e3ed30eb41759d96f4e49a78 SHA-256: 83217628f7c63dafbfadb0d37a5d6ad2504827aee0e6d6376674bba1db14f32b
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'traffset.ru', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=latest+african+house+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f8881ed4a0ae.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/pasat-lunamatev-xudefujuvate.pdfIn PDF document text
    • https://bubamixidik.weebly.com/uploads/1/3/4/6/134657394/wuxegufimuletu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495974/normal_5fb53870b2cf5.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/6312747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f874f4f88a00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/410b4410-ffc4-4107-9ee7-452073c2d0ea/wilderness_survival_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/detective_pikachu_online_free_movie_123movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e31a4d-699b-4af2-bad0-e9ebb6990e7d/terzaghi_differential_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/cics_reference_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/free_movies_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8834a2-5046-418a-b839-3b91f176c315/apwh_dbq_rubric.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73F 4912 bytes
SHA-256: 3e75a3b57bf6d48dfadbaa11fc8a055d4beac24a798503dca2c5dd5c9d488bc2
font_01_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 10404 bytes
SHA-256: a654283e0e59650e04cc9961c7efb89045dd782fe02ed4ab696577b51eac7404
font_02_sfnt_off00010b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B86 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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