Malicious PDF — malware analysis report

Static analysis result for SHA-256 153eadcf22bf324a…

MALICIOUS

PDF

73.7 KB Created: 2021-03-25 12:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cc96b7ab9c7680596ac27dd630426338 SHA-1: b4df9b77e73903676f06daefa2baca672d9d106b SHA-256: 153eadcf22bf324a72a871454b843f4b21d94ffbb8764a3c965ef252b35f47e6
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the ClamAV detection name indicating it is a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=ahlam+mosteghanemi+livres+pdf PDF link annotation
    • https://cdn.sqhk.co/zokuzadisup/exZjeF8/komorip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_605059b8cdbec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475219/normal_5fe176dd43090.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/eHh7rhf/diamonds_seat_belts.pdfIn PDF document text
    • https://cdn.sqhk.co/kukusagufo/ohaiaSL/baahubali_hd_video_songs_isaimini.pdfIn PDF document text
    • http://bekokasutam.22web.org/firefox_developer_edition_full.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_604a923445c1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5ffc7be138787.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_5fc8e6529a519.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9bb213-ba27-4df0-8320-11a96ad1fe4b/why_my_fridge_not_making_ice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26afe993-7def-4b68-a5b7-41524b51a823/87217060391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffef4de-9a5b-457c-bcf0-e98ae8f210b4/hampton_bay_window_air_conditioner_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee97d991-0de6-4b61-9f16-1c82fc12eeb4/buxodasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94576369-e4c4-40cd-a3b3-2d7fb73f743b/tablas_de_integrales_inmediatas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07968d4c-d24c-45cd-8587-3e4ab16dc3a3/what_is_another_word_for_captive.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_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 5504 bytes
SHA-256: 5a93b54525cea31985f056a6ccf6d20f7a773d2a88827559cbb49cc30eb479ff
font_01_sfnt_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 12216 bytes
SHA-256: 82745d0c3dcdd49d9daf0aece3b8b224501d9164e114ee9366535d6c460981ab

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