Malicious PDF — malware analysis report

Static analysis result for SHA-256 3081ebbf3a6b18a5…

MALICIOUS

PDF

78.0 KB Created: 2021-07-18 07:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d0240e62f7334cfb4abdee75acb6293 SHA-1: 1fdba26ce8a91290964ae3c1e942feae7d67e0e6 SHA-256: 3081ebbf3a6b18a578b5554144e115083ab5b9411e565ff9e04009142bb52617
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external resources, which is a common tactic for phishing or malware distribution. The file's structure and the nature of the detected heuristics point towards an exploit or a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8621

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/-7-cX3opz_8/square?utm_term=put+off+example+sentence
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c3384261ba79805ff9b8/1625801528101/lolagifulefufujomeki.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1cc4aa0e4450875019a24/1626459210510/the_penal_system_an_introduction.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2029514cbee5866455bd6/1626473109476/plosives_and_fricatives.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0253a8fff8309febb589e/1626350906595/programming_embedded_systems_in_c_and_c_2nd_edition.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f39b63db752c5e49aef0b1/1626577763592/currency_other_than_the_reporting_currency_of_an_enterprise.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_off0000d19a.bin
e4b12bab0ce6fb245b9fab0600b27781f793101a1396ca1bd9ef5ec83558971b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD19A 10652 bytes
font_01_sfnt_off0000ea1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 16792 bytes
font_02_sfnt_off0001022d.bin
774215cd5c71f25337008313078a034b1b9cf3fc0d1150d64a5caa3f8479d220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 16224 bytes

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