Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45671ff33c64b4d…

MALICIOUS

PDF

74.6 KB Created: 2021-07-17 00:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0d06cc636d66284fd281cf84e261dab SHA-1: 0061610c8b19956f07138009ef6c6e208e4091a4 SHA-256: a45671ff33c64b4dde4f92482012eb938ed5aae24fa498e9c564a9e6ee6b5314
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/IdU8rIDf9lQ/square?utm_term=m7+bayonet+with+m8a1+scabbard
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f14787d1fa142bceb114dc/1626425236191/gedosekenekeju.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed9ea858c2e00095616502/1626185384926/write_a_short_note_on_global_depository_receipts.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a5fa9a456f4cc409f2bc/1626383866932/gawet.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e86719c2c24e72b2b52a79/1625843481685/best_way_to_remove_wine_stain.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e769581d845235f5b48640/1625778520735/32051979261.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee552e39b82603386bacd9/1626232110527/non_squamous_lung_cancer.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecac1711a746407a4538f0/1626123287767/introduction_to_the_theory_of_computation_michael_sipser_solution_manual.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_off0000c0ce.bin
0c592df0013fada6101ccbdf5ab472453c127635ebdbcf56433ff993e9deec25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 16628 bytes
font_01_sfnt_off0000ec12.bin
acb42e237f0b319d3472e1e008a41accd3968f87f03ca123b990cee1d23b7277		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 11232 bytes
font_02_sfnt_off00010671.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 16792 bytes

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