Malicious PDF — malware analysis report

Static analysis result for SHA-256 6601ecceeab5057d…

MALICIOUS

PDF

76.9 KB Created: 2021-07-14 09:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d69441dff1dd646e81b54e1073a1e04 SHA-1: 2a94a334092b5ee85ecaef789b32c38d85733022 SHA-256: 6601ecceeab5057dd866b5473d3ce96d6aae2fe9e7e532f9c1507fa697f71e95
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a malicious intent. The presence of embedded URLs, although many are confirmed benign, suggests a potential vector for phishing or malware delivery. The PDF structure itself contains indicators of potential exploitation, warranting a high confidence in its malicious nature.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/sq/ugae/~3/IdU8rIDf9lQ/square?utm_term=manage+my+home+manuals
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e1fdb630645a0ef41a0d/1625874941429/briar_forest_lofts_resident_portal.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9317b5fa2eb14b90c5d88/1625895291096/xosiruvofamifezejo.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_off0000cd7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7A 16792 bytes
font_01_sfnt_off0000e591.bin
57a59fa91d62b8e94e4796da1aaa3414ec1f92fe9eb6e172a3dfafbd4baddb95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 10472 bytes
font_02_sfnt_off0000fd2a.bin
983b89db6425bd2fb5ea012840efdadaa906b15e77b3eeaaf93ea182e6bd888c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 16088 bytes

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