Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f727bda9afc16ff…

MALICIOUS

PDF

77.8 KB Created: 2021-07-19 07:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76d981c638dae56c09554e1380a09379 SHA-1: 29ef92c15c6da127f554291d7897ecadb448ef22 SHA-256: 9f727bda9afc16ff269496030a3a233cce8167f9034fbdd2e5b62d8edc3af612
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or credential harvesting attempt. The file's structure and detection patterns align with common malicious PDF delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/X6hrLWyzjlw/square?utm_term=wagner+project+sprayer+manual
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e95ea6b68d8f0f4bfa2da8/1625906854689/631075295.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f32af7668793736d2f64f4/1626548983308/candy_crush_download_mod_apk.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed2704dacdbe35d626c1cf/1626154756545/end_of_probation_review_template.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca95ee7718717d7659c45/1626122590742/50122603451.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc7029942ff19c76511cb/1626195715015/unitary_method_problems_for_class_6.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94248c4c1a734c5d7f842/1625899592590/65067209014.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3568a731d8c7c6ffd515d/1626560138462/biogas_as_a_source_of_energy.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8b1ab6dedd3ae1699fda/1626114842844/31822178292.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4297e6d5e991e36e7d8fa/1626614143110/anaerobic_respiration_in_germinating_seeds_experiment.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e914b7cc7c086459266c57/1625887927422/dilolar.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_off0000d08c.bin
0b54fe94da311cf17e860c44a96d7cb9fe0f083f07af61a7533e4a0438d2a44b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD08C 10964 bytes
font_01_sfnt_off0000ea17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 16792 bytes
font_02_sfnt_off00010229.bin
b9da165a9da503a67840fc1305490bf1f1ad17da3fcd754689e449ab464c9c4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10229 15904 bytes