Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5c78514cdbd801…

MALICIOUS

PDF

75.8 KB Created: 2021-07-16 10:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a3614ef07982860c5c9717f7fc95fc2 SHA-1: 81525bb6e0800cb38d63a7b88f71afe9e487dc35 SHA-256: 9f5c78514cdbd801d60a6d1886e1c97e3ed5094e00a94be30ae03a8f33384ebc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a suspicious domain, likely intended to lure the user into a phishing or malware distribution site. The PDF structure and embedded content suggest it's being used as a delivery mechanism for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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://huntic.ru/square?utm_term=this+is+just+to+say+poem+analysis
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e92acab630645a0ef7c263/1625893578376/10452712304.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee7d40e7148d06bc74792a/1626242368595/vizimekofu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee1fcd9c71001bedf39adb/1626218445417/pdf_to_word_converters_freeware.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec81467a1add4dee1f4e46/1626112327087/94724685931.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_off0000c5bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BD 16792 bytes
font_01_sfnt_off0000ddd4.bin
a4fbbf97e505f25bfcc1ef58a988b4f45a4df92f160c35675d6ba9261a1ccc65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 10724 bytes
font_02_sfnt_off0000f64b.bin
4b47e97f50d033ab48386feb2e54018b013695afb44b416e5a79824c50cf9099		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 17204 bytes

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