Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d93b2f252fbd9f6…

MALICIOUS

PDF

98.1 KB Created: 2021-07-20 23:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 874b2af014378ef5901680f011dfd3bb SHA-1: cfcc0d91678e0c1a7826811221cd7a1c47b45e09 SHA-256: 0d93b2f252fbd9f6cd519613e32fb8f8337462a5453335c754e8b2dac2082f37
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs, suggesting it's designed to lure the user into downloading a secondary payload or visiting a malicious site. The presence of duplicate objects and the nature of the detection point towards exploitation of a PDF vulnerability for initial execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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/k6oGaauGqGM/square?utm_term=corresponding+with+you
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4e28b731d8c7c6f0fc717/1626661515492/audio_spectrum_effect_after_effects.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f08431a05bd62f13df13e1/1626375217115/41885476621.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f051244605fe57955710f3/1626362148237/indian_corn_fritters.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f202f44ccaf47db64f1615/1626473204878/vizevizisegibukojuli.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5307e7148d06bc7262e7/1626231559745/70_thinned_cervix.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f63abf357ac316222b15c2/1626749631495/puxowodareve.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f05f54c772d7746b537f7b/1626365780318/how_to_write_friendly_letter_format.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f01cd849582827e2feeec5/1626348760468/get_my_check_irs.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f11e8cd1fa142bceafb5d3/1626414732906/realize_simple_past.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec71a912c1416d2f18d9e5/1626108329610/deadpool_2_coloring_pages.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f201b0591751629a2f6f9d/1626472880943/harry_vardon_and_francis_ouimet.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f450f7b386920ff6d6398a/1626624247134/bee_sting_red_and_itchy.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f78e.bin
9b9a10fbdcf3b4dd2dac005f6cc8161dc1386ebc1101047c0818bcc5dd90e935		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 10792 bytes
font_01_sfnt_off00011041.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 16792 bytes
font_02_sfnt_off00012853.bin
65245693c50f59c396496b44d28c1b00ced7d4ee9aa5179bed7a3decd134a2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 16196 bytes
font_03_sfnt_off00015245.bin
8918c1b2cdff5257f5b189bf2a8f5a40e9fc272ecd685f7642d9d800f02eb2a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15245 14708 bytes

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