Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6af76d9b69e517f…

MALICIOUS

PDF

75.6 KB Created: 2021-02-08 09:33:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 990a18ddc783693a7c4b72a3e3a7abaf SHA-1: 2e21f01c4d7f19db48d2778ad9e4ab42381bfd45 SHA-256: c6af76d9b69e517f1b1fbee9468a2fa44feeed0f6b0d42482615b968b6901bc0
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Poe cheat sheet'. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/aws?utm_term=poe+cheat+sheet+3.+7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366623/normal_5fc66f943b771.pdfIn PDF document text
    • http://normal-id.com/roxetimanusojirenyl0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_6014e755da9d1.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/id1hh08/50893667220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_600bbbb780de4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409394/normal_5fe4271091d02.pdfIn PDF document text
    • http://salonly.xyz/baloxezuwosoxa64g7p.pdfIn PDF document text
    • http://blu-ital.space/hurt_feelings_report_funnycib8r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fffebdd62695.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/pisedij/rijden_in_een_auto_zonder_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/playlist_spotify_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/547971750.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/frankie_and_benny_s_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/vinele.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/clyde_river_fishing_guide.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_off0000de63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE63 4668 bytes
SHA-256: df20d5e1b0854f7cb11cc8efcd072e6d5adbeab877cf2a37821695ee8bba3bb2
font_01_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 10804 bytes
SHA-256: 9f3cc51f4255349f495887a7bff530cc3093b87dd0767d2594164e7654399981
font_02_sfnt_off00011319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11319 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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