Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e4cc2fa424b9cf…

MALICIOUS

PDF

91.9 KB Created: 2021-07-17 18:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08ef263cd1a15fd0915ae968dcc379d7 SHA-1: 7b5ec20b8bff5a8cca0290bd156c979248746d79 SHA-256: a2e4cc2fa424b9cf54872da9932f5b91c1095a89da89aba0d43d6e2ffd36c47c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to a URL that, while currently benign, is part of a pattern often used in phishing campaigns, supports this. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall context suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/pL_UGxDroB4/square?utm_term=cpnvert+pdf+to+word
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed2bbc02ab3a569c416b1c/1626155965161/which_bacteria_cause_typhoid.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee3859c27d1e40a549dde8/1626224730133/the_lesson_of_the_moth.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8fcc0e7a3c5fba3e7065/1626116044647/vudafabod.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8781fa40056e74d2ad2b/1626113921493/ripping_small_pieces_on_table_saw.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_off000106a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 16792 bytes
font_01_sfnt_off00011eba.bin
b3612729915e9760149b9f8cd1c93fda314fde4cc67a0674e3eca76d24709e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBA 10204 bytes
font_02_sfnt_off000135c3.bin
2a9f8b5264c7dccae7d195e6dbb1d751fcac95201b0863cdb958b5fed9ebc66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135C3 17200 bytes

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