Malicious PDF — malware analysis report

Static analysis result for SHA-256 973465e95c4d4a18…

MALICIOUS

PDF

83.9 KB Created: 2021-07-17 10:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: daf859dac17be9bb2653118a53264b91 SHA-1: 59a5a662f757199e9ae8eab8db0bfc4fed1eb4cf SHA-256: 973465e95c4d4a1809538e84a18e5dc3390d5e20d77d2e2acd0831b983d0913e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. The document's content, though heavily obfuscated in the provided excerpt, likely serves as a lure for a fraudulent scheme involving lottery winnings or parcel delivery. No scripts were extracted, and the embedded URLs, while numerous, were predominantly classified as benign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=the+most+beautiful+actress+in+korea
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e959ed3f195e1e4038071d/1625905645402/perfect_liker_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2398229712869f05b45b4/1626487170615/80418675213.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8824ed5f0753ec0a4f131/1625850446305/ms_office_2007_activation_wizard.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e906cf83ae0c490237fc8c/1625884367140/pazimojapurasogebexi.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f16be45142327a87447589/1626434532571/convert_ms_word_documents_to.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee55c327fa864c7d134717/1626232259226/zimbra_mail_server_installation_guide.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93585b673687559686b37/1625896325810/revised_new_oxford_modern_english_workbook_7_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee20f08e3fff2bd3be46be/1626218736416/98606554988.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_off0000e564.bin
4e38d1b98e67d6a2abfaad3c37e6f6ff2181f8804c85efa5bda25f5dff2494d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 10896 bytes
font_01_sfnt_off0000fe72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 16792 bytes
font_02_sfnt_off00011684.bin
dd38aeeaa173de59ab9fc8b172afc05ad06edc5563a2c1192a10211eb60ce399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 17184 bytes

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