Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f737efe0540157…

MALICIOUS

PDF

66.3 KB Created: 2020-11-13 00:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ea84ef5fb8d3775f6ddc7c63f730a10a SHA-1: 91c92cd7188a602fb6dc98a21643700ba8753f4f SHA-256: 92f737efe054015780130e92986ab641cd3e7aa4cc52f60e8c64df3230be031f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru' which is likely used to serve a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to downloading a 'Python data science handbook PDF'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=python+data+science+handbook+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409819/normal_5f93bf7420429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8feb21c40ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_5f9f881fadc8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5f96b5fc61d40.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://s3.amazonaws.com/bitizopovopaso/porodiditunetijono.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/21278026296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac829de-99a7-4c0f-b2ff-37ace7016740/57463075125.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/rogilebumolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ded3b7-2910-4e21-bd06-25578e8ee54b/95922587589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9506d3-b808-434c-9f8e-53593dfae6c4/gujorekolezikujod.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_off0000b7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7ED 5428 bytes
SHA-256: 47ab4a5a76299b624c067e38ff076bfcf2a71b8894008e67b6f89e12299d729c
font_01_sfnt_off0000ca65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA65 10544 bytes
SHA-256: 182b546d2caf4d9d4cadbac22bd801f74633869a18edbddc6ada510ca352273e
font_02_sfnt_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2