Malicious PDF — malware analysis report

Static analysis result for SHA-256 7641d072b7defc43…

MALICIOUS

PDF

67.1 KB Created: 2021-01-05 06:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8d0462b4125f9ec621dfc4da43cbcea9 SHA-1: d0a9411198f9fff2e76034f9af9ef50abb413afb SHA-256: 7641d072b7defc43bc2bc32a875ad32fd5010ccd011bfc5d7fb4e57904ffeb0f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. It contains an embedded URI pointing to 'https://trafffe.ru/aws?utm_term=powerpoint+background+simple+batik', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Powerpoint background simple batik'.

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://trafffe.ru/aws?utm_term=powerpoint+background+simple+batik PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452861/normal_5fd61bd9e15ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387825/normal_5fe54ea8a2d56.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/8gj3kjg/pocket_rocket_bike_pump_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/likamigid/Kjdijja/89207077296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penale/xebedidunojakoriwi.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/1080p_video_er_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/sogin.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/ac_current_sinusoidal_waveform.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/2314496883.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/rarugozomavapu.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_off0000c8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AB 5692 bytes
SHA-256: 4964cabab5a442d1b88ae758d187c18d23ec115471da8a6148f5bfae2487b8f0
font_01_sfnt_off0000dc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 10720 bytes
SHA-256: bcb59ec9b681975d9fee7368adab0f351dea063080f3b54ee77f38959a128e87

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