Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f9827c1489307a…

MALICIOUS

PDF

156.8 KB Created: 2021-07-14 08:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b9bd8fce9d7e042646a65b1349b6e327 SHA-1: 63d368a72b47d83d0d01b00a615393356777a508 SHA-256: 92f9827c1489307a55abea4b9d249adcc413f092142a75bdb0210b38bd9dd520
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan. The PDF contains an embedded URI pointing to 'smidgel.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the presence of an external URI in a malicious PDF suggests an attempt to redirect the user to a malicious resource, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3565

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=grim+dawn+mother%27s+gift
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8a0620d7388251f4df45c/1625858146196/lean_in_synopsis.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee318f7d49fb55d6269fe7/1626222991907/writing_in_red_pen.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc12f172ba47bdac06e07/1626194223758/xazudomofubilesusad.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd7e437ddb5439bf62fb3/1626200036621/46080573524.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_off00020a0a.bin
8dc44bad56958d17498a83a86a7e54bff415a471f983b28a0506d9834004e222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20A0A 17040 bytes
font_01_sfnt_off0002363f.bin
c0b442c29b520125bf8e24439fac16c09548dbcd0fc081e2fa0af5e0756fd936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2363F 10916 bytes
font_02_sfnt_off00024f45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F45 16792 bytes

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