Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9511d14bdadffe…

MALICIOUS

PDF

74.7 KB Created: 2021-07-14 00:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3412bfea5d342478a6ad53b74daaa966 SHA-1: 58c6ab0e052773b18ca212526e02bbbd5253b6f9 SHA-256: 9c9511d14bdadffe47edc987b8e46182847571beb2e2238d15d9ac33aaa56a4e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and also by an ML classifier, indicating malicious intent. The presence of embedded URLs, though many are confirmed benign, suggests a potential phishing or credential harvesting attempt. The file's structure and heuristics point towards it being a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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://feedproxy.google.com/~r/sq/ugae/~3/5Aj-mlxkUx8/square?utm_term=frequency+distribution+questions+and+answers
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ebc7b9b95949b65c1bda/1625877447661/croatia_places_to_visit.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e76bc6e4919b7a951adff2/1625779142628/natomofubef.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8714de8c3264fe5f51ba/1626113812805/short_stories_by_ruskin_bond.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8174e6e46386ca3c2fde2/1625823055215/24036897225.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93585b673687559686b37/1625896325810/revised_new_oxford_modern_english_workbook_7_answers.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0fd.bin
48b9072de1413b6c958b89d49d81f16be7c63f8e8afefebadbba900bc218b344		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FD 10880 bytes
font_01_sfnt_off0000da1c.bin
a74ae0d4091e71984f4b9a16f8a93dc4dece51af88d0b533a824c0c0c96161b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 16992 bytes
font_02_sfnt_off000106ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 16792 bytes

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