Malicious PDF — malware analysis report

Static analysis result for SHA-256 e707a38d70169dbe…

MALICIOUS

PDF

87.8 KB Created: 2021-07-15 09:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e333bf6b85bbb7738718e6d5ed8b1f2b SHA-1: f39d072be15408e47ccaae728f42180a20c1f9a6 SHA-256: e707a38d70169dbe5384ffd7307b0c6cdcee4d5548495cd8d0723e38c81fca78
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URL pointing to 'inwebjor.ru', which is likely used to redirect users to a malicious site. Although no scripts were extracted, the presence of the malicious URL and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4086

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://inwebjor.ru/square?utm_term=divide+synthetic+division+calculator
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c666f4d7c53d8b124da4/1625802342437/gewijetorapusumedoz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92801b630645a0ef7a0dd/1625892865082/zosewobupowareluxaf.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e77e433912f07333d826c1/1625783875919/53863248498.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_off0000d901.bin
05a4fd1467e67d3a2f2266a6cd4d46c8f1771c17856272775f3dceb6928f9241		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 10748 bytes
font_01_sfnt_off0000f1ad.bin
23cb7b3d305d5591b0aebe874c77e39d0fb8775271a96783eb294e06b0a2eff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 16736 bytes
font_02_sfnt_off00010997.bin
ef9524ab4b7ff46445539e40eadfd07a8aa8696b513695f5935ef71088795a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 18768 bytes
font_03_sfnt_off00013ac9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC9 16792 bytes

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