Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef701b2df1a765ac…

MALICIOUS

PDF

77.6 KB Created: 2021-07-14 05:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 615503918a9a6ec1e3cb2d894da76531 SHA-1: 58d79a7cdad514b2584a29dbd860c5bb77a5f36e SHA-256: ef701b2df1a765ac34efad6f90d416fa95187ca06b9a40e5f066a6a5af8207f0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used for phishing. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://crysiq.ru/square?utm_term=is+a+38+week+baby+full+term
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b6ab52059f1ec1e22b5a/1625798315441/meaning_of_prophylactic_treatment.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e95be13b7e7c633451f40d/1625906145645/authorization_letter_to_collect_house_key.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e78fb56e46386ca3bc29dd/1625788341879/19642639979.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edac14c2b60e0ed5b63a4f/1626188820931/rimimaxevipebikewir.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_off0000cf6b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 16792 bytes
font_01_sfnt_off0000e782.bin
0a9488fdfdbffb551b6aaa25483eda071b4922e750213cb7c79680bf18ac6937		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 10924 bytes
font_02_sfnt_off0001010b.bin
d3c7d1cdc4f823cb87a13ac2c8e22caa26a39cebba71272362b3c1265f785f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1010B 16244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.