Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecb0ea271dc0a1c…

MALICIOUS

PDF

80.7 KB Created: 2021-07-18 21:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d632dc1128ac06657c8798b10d6aab5d SHA-1: cd06a81f812794e66742adf80cf34a9cdc67d400 SHA-256: 5ecb0ea271dc0a1ce9183d0d0583e322fb31621875e5a90bbba1340a0a387eb5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URL, even though marked as confirmed benign in the provided context, suggests an attempt to redirect the user to a potentially harmful site. The PDF structure itself contains duplicate objects, which can sometimes be used to evade detection or embed malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/WVKuihPcy9U/square?utm_term=surface+tension+lab
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee436427fa864c7d121fcb/1626227556974/24578577466.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2397fea581e22be2618a4/1626487167554/63293330481.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec84f3dd2ac847ff7ec51d/1626113267979/shadow_of_the_tomb_raider_bikini_outfit.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f134d7b348e55d1c52022e/1626420439411/92005424140.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8eb632f3c4128e187a230/1625877347283/22142217663.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_off0000db44.bin
5fd4fc6e03302f665e8fba616f89a56125a9d5f33488b33c9394454dea69a7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB44 16652 bytes
font_01_sfnt_off000106d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 16792 bytes
font_02_sfnt_off00011ee7.bin
e44b5ec2e40deb3834a7f61b72a4b36e1bd1816d06a19ecb0e9582434b5b0c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE7 10644 bytes

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