Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e3c8ec0932ad97…

MALICIOUS

PDF

88.4 KB Created: 2021-07-19 07:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c71e2533298fb0968018482dc607c98e SHA-1: f4032fbd1e0bec71d7aabbd67753b9fe99b1665e SHA-256: f6e3c8ec0932ad976758f60aba3cd6858039795bdf426476482afb8c5503e428
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites or download further payloads. The document body was unreadable, preventing a more specific analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8627

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://feedproxy.google.com/~r/sq/ugae/~3/cEZ-xJcQpFE/square?utm_term=malthusian+view+on+population+growth
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edac3fc0b9b61b59763b35/1626188863296/zelegupepored.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7a1540121f566898fbc4/1626110485352/kawisijokefud.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f08567f02e551ecfa646e8/1626375527841/prayer_concerning_worry_and_fear.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f077aa1a769948b75351bb/1626372010129/0.2530_hectare_to_bigha.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f35a4736db646251a09b46/1626561095811/what_is_the_purpose_of_the_world_bank.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2837580d83038fa79c97b/1626506101502/3_chambers_of_government.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0eaa7fe1af12ac2c0750d/1626401447679/diary_of_a_wimpy_kid_rodrick_rules_online.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_off0000f9fb.bin
5c499f95a9ee81b02c37f3b52f6b8e33cee68aa88cca74d10ffe62f82f48857a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 10776 bytes
font_01_sfnt_off000112d1.bin
1b3224886f53e673289ad2d505c33c43983e59a588ad18ef423106746216abeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D1 16440 bytes
font_02_sfnt_off00013d48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D48 16792 bytes

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