Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb197a750d0b557e…

MALICIOUS

PDF

78.1 KB Created: 2021-07-19 07:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 505eea2f3929b588913c87c020e5eb3a SHA-1: ae18712b2e04a0e5b1be178151d2202ca324380b SHA-256: fb197a750d0b557e296d847d803b1a46ab60fb0cab41597a4a29ba633bf42043
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The presence of embedded URLs and the obfuscated document body suggest an attempt to deceive the user, likely as a spearphishing attachment. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8134

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/~3/9xivtwLAy4k/square?utm_term=tumble+dryer+not+drying
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2f43c6678663e6a2b93be/1626534973294/70223026698.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7d44dbb514329fae939a/1626111300413/we_coming_back.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2c9b727519501fc0b6ebc/1626524088039/jerk_off_with_other_men.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecbc448bd1c264bea6903e/1626127428152/best_way_to_cook_a_burger_on_the_stove.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8c653080d76c7a511954/1626115173670/right_of_way_def.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_off0000cf82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF82 16792 bytes
font_01_sfnt_off0000e794.bin
a69d7cde3268107f766fb0ea74760ef00c8767454005d60c435fb152b6191a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 16732 bytes
font_02_sfnt_off00011342.bin
3925d8beabd2e086a89c59f5a9b8aac22bed7137cb3cbb62f0faf90d4fb054a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11342 10580 bytes

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