Malicious PDF — malware analysis report

Static analysis result for SHA-256 af63863c456e9fba…

MALICIOUS

PDF

87.7 KB Created: 2021-07-13 08:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28fb8713c24f007051707f477bfbda64 SHA-1: b2aca16cf8444efb82bd941d48be1db244c97458 SHA-256: af63863c456e9fba6192254923b481218d263a6eac102faced712c8454a4536a
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, 'chcial.ru', which is likely used for phishing or to host malicious content. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7164

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://chcial.ru/square?utm_term=free+standing+staircase+structural+design+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecd583688cba50b674a31b/1626133891871/mental_incapacity_contract_law.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e948a7b67368755968e963/1625901223748/79651305872.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ece4dec2ef2d11c8cf880d/1626137822786/kind_of_chow_chow.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7700db93bc0247a05ecaf/1625780237736/98466777020.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e944ea19a9f87deb73fce5/1625900266503/60924153730.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed1a919db072196a1e953f/1626151570036/4126807169.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecd6f1c50d503b9d501d98/1626134257174/2430815789.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d718.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 16792 bytes
font_01_sfnt_off0000ef2f.bin
accf2512f27407b1fce79e9aaa322d002f9e9aa22582073323c06b866b6d4d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2F 10752 bytes
font_02_sfnt_off000107cb.bin
bd137d21d7990566fed70aac2e5fa124fcd3c3ed86f3277d967d13c71818b097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 17872 bytes
font_03_sfnt_off00013734.bin
f6cca4136a4bfd75b96dfc697fc82eee1b9e744b6080367ea6bbfb3cbfa4a8f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13734 17708 bytes

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