Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43f6fa201248b75…

MALICIOUS

PDF

74.6 KB Created: 2021-07-15 23:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9c3b12f3633733b68c85bd79feb94f3 SHA-1: befd571eb3fcf8531f2f22dbc246880aef73432e SHA-256: f43f6fa201248b751702a9ff84d6d3306e645f6442f9d4f2bc6e33fdd700acb3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://crysiq.ru/square?utm_term=sure+tamil+meaning', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL and the overall detection indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

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://crysiq.ru/square?utm_term=sure+tamil+meaning
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e897d934bd5b0c1bb59e71/1625855961177/belep.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8872d0153e73bf8c5fc9/1626114163063/dried_minced_onion_to_fresh.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edff6dbf52576c624aa82b/1626210158024/clean_shave_for_round_face.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_off0000c205.bin
e4f2833d0914162fecd2ded210e45736e3f6957480ca99776b4e58f0f8301948		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC205 16956 bytes
font_01_sfnt_off0000ede7.bin
1f3bbcbd3e0805e80ef84c87e3a07b4313e2b57f53404348f5bd2f6dc21116b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 10336 bytes
font_02_sfnt_off00010534.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 16792 bytes

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