Malicious PDF — malware analysis report

Static analysis result for SHA-256 66478d9ec0ae1894…

MALICIOUS

PDF

77.0 KB Created: 2021-07-21 12:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad7c76310427f1e73a9f76c7f3b3c41f SHA-1: ba2445cde5222edbdb5bead3e1978614e8c87d89 SHA-256: 66478d9ec0ae189430f923fa913ef70a8a85e78bc21745d6be2af77e43d55036
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 high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or redirection mechanism. The PDF structure and embedded artifacts are consistent with a malicious document designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/AG-UZpNbJGc/square?utm_term=123movies+puss+in+boots
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f747aa09d4b5409f3427e2/1626818474213/english_grammar_subject_verb_concord.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0083afdf15601434ad962/1626343482574/hispanic_baseball_players_in_the_hall_of_fame.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f5be3be2d11311713d8b36/1626717755829/84422613668.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee0354d6ef6771c1dfd8f1/1626211156638/28509858624.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5710eb386920ff6e4fcd9/1626697998383/cold_coffee_at_home.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e86aed8e00cb4bc9a9a844/1625844461586/dobotamusutizus.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9fb0934d360eb28af4a9/1626120112191/kurt_carr_jesus_can_work_it_out.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f7b61b3bf5736ec3894b30/1626846747933/george_lopez_weekend_at_bennys.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f42acfb84a576e6c07fc05/1626614479432/collar_cells_function.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_off0000cb7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 16792 bytes
font_01_sfnt_off0000e391.bin
bd391036ceb24d41f43e0403cc863afeebf21a85231b785d41b15ec7bdd51986
pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 10660 bytes
font_02_sfnt_off0000fbda.bin
38ff78466d6558d1fe7519ab6807992a8622735756bc0cf6ec7ebd3f322e3ce6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 16988 bytes