Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d7a0efc02e003f…

MALICIOUS

PDF

63.2 KB Created: 2020-12-24 06:57:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a9bb98f75fe4fbb064468cdda3fce7e6 SHA-1: 76dc35302823f9c7abca5e59d23032518b366703 SHA-256: d9d7a0efc02e003fad8fb8572c64c04245cbb535d175df34c9c8beb9dd6f124e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing attempt.

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/strik?utm_term=celestial+seasonings+tension+tamer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f8ca8c3c4f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5f9c8004729b5.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/hgRe2ig/real_football_2016_apk_1._0._7.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/ihiiai2/82671246283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fb43b1f9c881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5fc3dfc0c204b.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/Y8jfjiK/84848374693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5fc56b587d431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_5faf2d63c6ab2.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/CgXxNie/lefodurilobadux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5fe405d4d7808.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/a27c0953-5902-46ba-a583-4294c5921c29/grape_ape_growing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85a4c00-e74b-49de-af65-9a37a43e1d3a/musica_cristiana_alegres_letras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725ec9bf-7d78-4156-8d8b-a2d0ab2239d7/sample_f_statistic_calculator.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_off0000bab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB0 4908 bytes
SHA-256: 5aa45fed4f0c09fa510571c5249264dde90a3e1681679bf63c5984bc19ffb6b9
font_01_sfnt_off0000cb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB45 10736 bytes
SHA-256: 47bc6a37e3b40108b7f82b34b50d3a9ad1a00abddbe9681783dbda24e5a4dbee