Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f53199a81def65…

MALICIOUS

PDF

74.0 KB Created: 2021-07-20 08:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b98b644bd8cfd81e048a10a58b4c5bb SHA-1: 0359fb3721873664ff12bca7c61f4b537eb19b24 SHA-256: d5f53199a81def65d1771364659c11ba2304e7ec37857db6f78efadd67e753d7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a URL that, while currently marked as benign, is part of a pattern often used in phishing campaigns to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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/ZFaGRQ6RLlg/square?utm_term=social+security+rockville+phone+number
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f276b61ad9bf1c32ab2bf4/1626502838394/vuxopakofumofaxiseri.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f61b091a3fa17743ce4e7c/1626741514112/28377972065.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f16e445554232196bf9819/1626435140181/kamijegoxuxajikod.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6033c13864f6949303983/1626735420243/91162049107.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7910dd2ac847ff7d8d80/1626110225136/pre_blessed_food.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_off0000bf5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5B 16792 bytes
font_01_sfnt_off0000d772.bin
f7054b8005338a55b0354469541cf8d78f046a27d7bc9e424a95e8bc8717295a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 11224 bytes
font_02_sfnt_off0000f15b.bin
9a1bf1bc6505becd2ae3f7bc86f18fb6f42ec033396e21ab81f1f6a19fa74a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 16444 bytes

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