Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e284dfdb017395f…

MALICIOUS

PDF

77.9 KB Created: 2021-07-16 10:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25a3c04ca3015bfca292038af634f743 SHA-1: ab73b845db8a75150a6ce67cdd9791f286816ed2 SHA-256: 1e284dfdb017395fc2f99c516d45de8ed8587d99d999637fbe48957aee84fabf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The presence of embedded objects and the nature of the detection suggest an attempt to exploit user interaction via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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://smidgel.ru/square?utm_term=what+phase+change+shows+a+change+from+gas+to+solid
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94ce20cbdad4d35071d9a/1625902306253/coc_town_hall_10_hard_base.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecace67b14134336e0a8fd/1626123495095/2780368922.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8ef09c874e7142488c05/1626115824946/29631513062.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcaafc450ee47307cad0b/1626196655755/36787076287.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0dd78feeeb055d964deb/1626213847393/in_the_heart_of_a_seed_poem_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee16552ee8b51fd9323843/1626216021696/24119506498.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee3966e9cbfe6c2fe7bd8a/1626224998883/tagozikunijafi.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_off0000cfcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCD 16792 bytes
font_01_sfnt_off0000e7e4.bin
2a323e88897605ad9e4427397c847d81b6118ecac2605b7acd538fb1c814bd1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 11148 bytes
font_02_sfnt_off00010194.bin
9e9f59335c8fb5e615dfb52211e9cf0114d40c71b8eb205eb37afab3ec2ab337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 16220 bytes

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