Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3d380e202bae97…

MALICIOUS

PDF

69.9 KB Created: 2021-07-13 10:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93175079d5aa7b2dc90d7931fd991ba0 SHA-1: ac0c5e7ba0540fad05c55bdb50cdfc347b99a370 SHA-256: dc3d380e202bae973e7bfac87da46ddae95d0b06cbd3623e90f33eeb5004ea3c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. An external URI was found embedded in the PDF, pointing to a suspicious domain. The presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a malicious site, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8216

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://pistant.ru/square?utm_term=you+are+my+hero+ep+1+eng+sub
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91e222210ba6bce1208cd/1625890338263/crooked_creek_subdivision.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e90c40309bd63f3d854f1b/1625885760798/magbook_indian_history.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8f8a8dc37083541b6f6ba/1625880744631/litasowuzuforevimuzej.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ff42b132fa362071e6a9/1625882434732/kesepaxukodagegitilig.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eccad438b7e93e8f977e1e/1626131156473/princess_and_the_frog_dr.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_off0000b271.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB271 16792 bytes
font_01_sfnt_off0000ca88.bin
d2fda8a55a9022804969d8b721481d3ca4da5595d5f4df9b88ba84571dd6e29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA88 10852 bytes
font_02_sfnt_off0000e345.bin
999c59a846e2519d12631015af9bd6e8e3b213537bfc990f74a42b1f68e35c77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 15716 bytes

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