Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4bcdb5e12ba1c4…

MALICIOUS

PDF

74.2 KB Created: 2021-07-14 08:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 360fcfd7eea9431de75f92273675e9a9 SHA-1: 428adee1997f13757ed7d269f0f06867be3b7974 SHA-256: eb4bcdb5e12ba1c4c1f3e4cda85ecb11463a1a3763423a81a602b8d94bc970f0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The embedded URL, 'https://krisoc.ru/square?utm_term=adult+cats+meowing', is likely part of a phishing attempt to redirect users to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit PDF vulnerabilities or trick users into visiting a malicious link.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://krisoc.ru/square?utm_term=adult+cats+meowing
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8939e64ce5371635621c/1626114362033/right_humerus_pain_icd_10.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb801b2cb0e52868c8b74/1626191873287/afcat_the_first_step_book_free_download.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_off0000c3f3.bin
3f359cd1f325b906b5ee0b1be377a5bc8b883bcc96872d0fb4d68815bae61a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 15776 bytes
font_01_sfnt_off0000ec6e.bin
63a3b12551ac9fc63db2970abb6439a25dfbdec2600192c06faa96cddbbd29fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 10780 bytes
font_02_sfnt_off00010525.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 16792 bytes

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