Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecea1d18cba73b4a…

MALICIOUS

PDF

89.5 KB Created: 2021-07-13 03:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78ddc10896b5d55af2c2de4878208d71 SHA-1: f6567712668d4411d0fe7b9b790fcd12673d13ec SHA-256: ecea1d18cba73b4a4bbe05f4b7f6d7c4ebc36eff6a2bc454be14512487d4cb26
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is likely used for phishing or to download a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF_URI heuristic suggests the presence of external links, which are often used to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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://feedproxy.google.com/~r/razvivatel/yapz/~3/IdU8rIDf9lQ/square?utm_term=burning+coal+oil+and+gas
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e78cde4261ba79805cb1b3/1625787614038/placenta_is_located_anteriorly.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec857cad1bf7105ccc10b6/1626113404104/nearest_guest_house_from_my_location.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecb2d6db07696a66563768/1626125014995/23866652957.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec99cf9cb57f380a799fb7/1626118607265/fegonavuzewijulalowoze.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_off0000fb39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 16792 bytes
font_01_sfnt_off00011350.bin
0ba9f41af112620395f2af1d39900fdf2110e84c56e81dde40deb0106094bf40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 10468 bytes
font_02_sfnt_off00012aee.bin
ea16fd76ae9cbfd0a52b1adcbac6e489b5e79dea8e95f9cf272d36d9b9da2bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEE 17992 bytes

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