Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f1be4b587512c1…

MALICIOUS

PDF

77.2 KB Created: 2021-07-13 03:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16742106b7af299f33b57d356b33b66b SHA-1: abaebe441bbaa8eacb19ef67bff6b1c7d7152b1c SHA-256: 04f1be4b587512c1c94c42760a2fb119797adc6822f19c4d4a7e09d9e5eb1ca3
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 'synerhu.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious resource, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5393

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://synerhu.ru/square?utm_term=spatial+meaning+in+marathi
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94d7a320dbd0de2826452/1625902458235/76213986222.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7f39fa40056e74d1c90d/1626111801810/son_of_the_living_god_meaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb7b8a9a8dd5e31c8a141/1626126265067/33429956068.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec82e64c0b954f9ea40bfb/1626112743091/2nd_grade_questions_and_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c388.bin
80fe5b633d4ef506647fd06ccbffc9953bdfaede9e7016d25ebc935f31dde2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC388 10488 bytes
font_01_sfnt_off0000db22.bin
bb9b4ed1df48cf6116778d03fbd1b3142473e7be00309830e8acad82eeaafb0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 16800 bytes
font_02_sfnt_off000106ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 16792 bytes
font_03_sfnt_off00011efb.bin
ee6d8c25003eb2de61ee1fda640ec7b8e4605923364b71ee832b966c85f0f81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFB 1780 bytes

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