Malicious PDF — malware analysis report

Static analysis result for SHA-256 87981c26b7241e18…

MALICIOUS

PDF

70.5 KB Created: 2020-11-26 00:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5122595648ffe5c32636df6a79026d17 SHA-1: 42e5a63461dca77b2d0c10019cff88a4c06589cb SHA-256: 87981c26b7241e18a8417d791c978e6a6bf9e702e7f20fc39b3b0e913e65900d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafficel.ru/123?utm_term=airbrush+apk+mod', suggests a phishing or malware distribution attempt, likely related to the 'airbrush apk mod' lure. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a malicious document designed to redirect users to a harmful site.

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://trafficel.ru/123?utm_term=airbrush+apk+mod
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5fae780247b15.pdf
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8c605c15af0.pdf
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5fb5f3fc7810f.pdf
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5f97e82a3691c.pdf
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5fbededd31d57.pdf
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5fbd8ba10f2c8.pdf
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5fa5d1f6ccabd.pdf
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5f9316e83d5bb.pdf
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fb5b3ed1bf33.pdf
    • https://cdn-cms.f-static.net/uploads/4405190/normal_5fb8cc0d51e88.pdf
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5faf0a8533f61.pdf
    • https://cdn-cms.f-static.net/uploads/4446161/normal_5fa065c4c61b6.pdf
    • https://cdn-cms.f-static.net/uploads/4472495/normal_5fb2b6fdee024.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/33cffe06-5830-49dd-9b77-6a105b1d653b/44070308038.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6c.bin
08eee95ed4c55dda764c13341a7d1a652976da863fbc5d9cac711d21d01765d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 4936 bytes
font_01_sfnt_off0000dc15.bin
6a8da34b3b43cc3424799006c93d065a9b9de059e420d73fe0e65a33289333d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC15 10172 bytes
font_02_sfnt_off0000ff16.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 4324 bytes