Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac72c1a3e462907d…

MALICIOUS

PDF

76.0 KB Created: 2021-07-14 01:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1a92df8e05668d6a3f63b0b3b4fb594 SHA-1: 1075510c506cf967e5fc4a5ee792f2da59464138 SHA-256: ac72c1a3e462907d93e7ef053a92a49a4d82e1889a27b59a989541f692ddef02
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs, though many are marked benign, suggests a potential phishing or exploit delivery attempt. No scripts were extracted, limiting further analysis of the specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/u8n3KCQdUYc/square?utm_term=spinach+yellow+leaves
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f65ac91b61347ea1ce67/1625880154998/forms_of_bind.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7b72c86d8930991a47b4e/1625798444706/bufojitadesejozi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec782b154eb17b6848df33/1626109995895/22615439041.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7aa7d8592fe3a588f1333/1625795198177/to_corrupt_someone_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e947a88ce0e10532d3d9f3/1625900968131/90096563282.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9587d2c5c2f6215caab9f/1625905277401/computer_suddenly_shuts_down.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0292afeffb59e675c592/1626210962828/dirinapifuletinoriweril.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_off0000ca0f.bin
ab857cb4bd366155e00ed09439c763fbbcc8b977df8e13311809e60afd300d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0F 16228 bytes
font_01_sfnt_off0000f420.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 16792 bytes
font_02_sfnt_off00010c37.bin
c4d8a1aeb963aef1b99004d6f44a263d87891f14a85d86c4293826b67c234677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 10616 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.