Malicious PDF — malware analysis report

Static analysis result for SHA-256 f839bcaa4a1ddcd1…

MALICIOUS

PDF

64.6 KB Created: 2021-01-02 20:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d0497de782dcfbbf0a30b75fd23bfa4 SHA-1: 7cb8bf74163b7584a54d033251aa0672d0c7a065 SHA-256: f839bcaa4a1ddcd17109f28b650287482d483ca9f988c807ab11c5e6f08fa815
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website seemingly related to a search query. This is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation.

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://trafftec.ru/wb?keyword=homer%20simpson%20soundboard%20online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369656/normal_5fe1eed7bb422.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/ih3hhhc/jekopozobu.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/iijhueO/53809066651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_5fdca8bc68404.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/BuMlgec/spastic_colon_diet.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/juliziwojatige/87887784584.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/zazopijugasanob.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/copyright_disclaimer_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/luwozug.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/amortization_spreadsheet_extra_payments.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_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 3852 bytes
SHA-256: 475c8217c765b0858d0dc5e374e610d36c511649c6f2bc289cbbc144e31805e5
font_01_sfnt_off0000be9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9A 5208 bytes
SHA-256: e19855a44239872ddb446d445aae547ddaea87a67027949eb7ca0bd2aba6a7e6
font_02_sfnt_off0000d029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD029 10736 bytes
SHA-256: 4acf08a75754b29d0032af5691ea010c97df8ff683dcebecf598f2edf176a9ce

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