Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdb221ab88777af…

MALICIOUS

PDF

82.0 KB Created: 2021-07-13 22:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11eb2aa70406099673946c997dcc6d31 SHA-1: 66e7a4f7a1a49356a7e6ee721f6a5d4da97f77b1 SHA-256: ecdb221ab88777afaf0675e693e69c57c1dd5ac5836f013e9d558a1fe603bfcd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs, one of which is https://feedproxy.google.com/~r/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=list+of+placement+consultants+in+pune+pdf. While the document body is heavily obfuscated, the presence of embedded URLs and the heuristic firings suggest a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=list+of+placement+consultants+in+pune+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed60502271a75a72d23696/1626169424615/hirsutism_due_to_pcos.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd88a6f118478735b6428/1626200202352/87727886528.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edda617979814f85a7d051/1626200673594/the_lament_of_hermes.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e87ad970d8222d3e640b80/1625848537474/26634313995.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecb9a54d4a7853b71636a8/1626126757980/structure_of_a_scientific_research_paper.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_off0000de80.bin
528d11e6a9ab1e76aa40c5b5fcf901d17b3fe0f6bcb6e54fe1e994c04a03314a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 17040 bytes
font_01_sfnt_off00010b10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 16792 bytes
font_02_sfnt_off00012327.bin
71d1aa6a22a3a1c2c1a49f39844bbb65da5d007cdc4bb743e2a5748bcbb36bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12327 10736 bytes

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