Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72afafc937476f7…

MALICIOUS

PDF

80.4 KB Created: 2021-07-14 06:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3f327a8d857488eead2801354b6daf3 SHA-1: 74d0f7e3f39717ba188f07907e7a934bc99d00ee SHA-256: f72afafc937476f7b12ad6b4a17a5d738c778a97004d034edf4b591fc1a32e2f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. It contains an embedded URI pointing to 'https://smidgel.ru/square?utm_term=personal+concerns+meaning', which is likely part of a phishing or malware distribution scheme. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8287

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=personal+concerns+meaning
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9d867b14134336df080d/1626119558914/rajajajita.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d06954da9c6696c5721d/1625870441926/41822799168.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1495a005482cc1532972/1626215573508/ranurarifunekoxa.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7ef659713006cbe0e440/1626111734240/xegovidukapimogurikupa.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee4edf796bb0196c62e386/1626230495909/kulidipivexotimazipebobir.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8230a6d117d6eeca70cb4/1625826058601/zatevijatenuxujojowujew.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_off0000d94a.bin
2159abc0b6f8c5acf0592ff52e079d2732b4bdf2f0357d02c5c7150bfb63782b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 16672 bytes
font_01_sfnt_off0001046c.bin
86694a7632566359ed74f018b0566c5a3646cb7a86fa89027aac3947264ff3bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 10476 bytes
font_02_sfnt_off00011c34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C34 16792 bytes

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