Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a67d0c58d8a4f15…

MALICIOUS

PDF

84.3 KB Created: 2021-07-16 02:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 457a9639977f55c6cefa947fc80422de SHA-1: 3fc83ec1ce802a3bc8c2851a264422fbf5d99bb3 SHA-256: 1a67d0c58d8a4f15f74e5fb726a7b60c1d18bb4a0b5bfd245c4cc0d524378c98
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier also indicated maliciousness. An embedded URI points to a suspicious domain, likely intended for phishing or malware distribution. No scripts were extracted from this sample, but the PDF structure and embedded URI suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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://allytemp.ru/square?utm_term=attorney+general+cover+letter
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f01cea39c5d52effb7be74/1626348778430/advanced_password_recovery_5.00.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f014cce4fb0f110d7c7082/1626346701057/69274641011.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9dd3f4b4775d04a1960c/1626119635452/xujewav.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_off0000e861.bin
9e1da5a1b844c82a40562cd2a0e3cdbcdbdbb5c3b5e5b3491229429e7eac5008		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 17080 bytes
font_01_sfnt_off000114ae.bin
870a85b6cbfad8870cd1d6138030edc265246ba5dd9162bcc7d188f0eafc73cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 10308 bytes
font_02_sfnt_off00012c20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C20 16792 bytes

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