Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee483650fad23e47…

MALICIOUS

PDF

78.1 KB Created: 2021-07-12 22:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 496dfb3d0ff666cd46840fdeb6064914 SHA-1: f875f1cd3cb99110d002c0d7c25ff484584315b0 SHA-256: ee483650fad23e47167e147fbbdc81c69cfc90af502a64c0d4d933060391ea04
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The PDF structure itself shows signs of manipulation, with duplicate object bodies. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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=baby+cooing+at+1+month
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec848da3e9df788e6d8471/1626113165716/which_creature_has_3_hearts.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e885f29af3861f94356345/1625851378621/13242545335.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7890d0153e73bf8aad86/1626110096632/bromine_in_ccl4.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c77509230f0e18425ff7/1625868149872/telolinazuwobasubob.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec848ddd2ac847ff7eb7bb/1626113165846/ropimazuka.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_off0000d168.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD168 16792 bytes
font_01_sfnt_off0000e97a.bin
44695465b0e0ea1ff397ce9eec1b702f79a1cd070e6f67c1a36b44df71a17320		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 16440 bytes
font_02_sfnt_off00011467.bin
008a337fb63912baaa7ac88a5715a72df47cf9a21f454f4cc50a6a682fcc7d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 10588 bytes

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