Malicious PDF — malware analysis report

Static analysis result for SHA-256 9181be464405e36f…

MALICIOUS

PDF

72.3 KB Created: 2021-01-03 18:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2311f1fcc6e2da868925be2ac04ed392 SHA-1: 9ec1a1cb8d00f23db27b56753814bb6329f11708 SHA-256: 9181be464405e36f1791495e36daa90572eb8e23b0ee03d6e3139f09542b85da
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, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text suggesting a lure related to 'Birds short story and movie'. A critical heuristic identified an external URI pointing to 'https://traffine.ru/123?utm_term=birds+short+story+and+movie', which is likely the primary objective of this phishing document.

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://traffine.ru/123?utm_term=birds+short+story+and+movie
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5fc18580592ed.pdf
    • https://cdn-cms.f-static.net/uploads/4422150/normal_5fa19859118a0.pdf
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5fa900a7098f7.pdf
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f905215afc95.pdf
    • https://cdn-cms.f-static.net/uploads/4451205/normal_5fbae61b90d23.pdf
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87031b236ed.pdf
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fba0b571d6e1.pdf
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5fae11f4ca264.pdf
    • https://cdn.sqhk.co/xulawajikigi/gieY9BO/vowaduxofukogase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/827e3da8-d5f0-48b0-a2ca-a0f1590cfe1e/32524463559.pdf
    • https://uploads.strikinglycdn.com/files/c6231918-60b6-4aaa-b7e1-071341fd910f/prestonplayz_wife_minecraft.pdf
    • https://s3.amazonaws.com/jarawaxanivu/wijukazix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec1.bin
746d6f499017d22f84c461e8df36ee84033634949d4bde592646b4c9b7f66d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 5244 bytes
font_01_sfnt_off0000f077.bin
908bb2f51897389a1408dcd4fa59ec0bd646a68cbc9a1c48db28cb0a19da557e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 10660 bytes

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