Malicious PDF — malware analysis report

Static analysis result for SHA-256 12709da37d8c8baf…

MALICIOUS

PDF

77.5 KB Created: 2021-07-16 19:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00322c75d2b0dc45789983a50ab53e73 SHA-1: 7e4b451e89dac465848fca25b34427907ff79c5f SHA-256: 12709da37d8c8baf596217423ad8b1401756813c9efad74c818bc5bdf3d402e8
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 embedded URL points to a site that appears to be a lure, disguised as a historical question paper. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/square?utm_term=ias+history+question+paper
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee32727426fb5109f3f8d2/1626223218195/the_story_of_the_adulterous_woman_in_the_bible.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7739cfa8c02622fab9c6c/1625781148364/hopeless_land_apk_download_play_store.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eff1561fe2fc56fbe4e796/1626337623040/linear_function_of_x.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee612e462f394a1e4496c2/1626235182309/download_enders_game_full_movie_mp4.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0b2e09392da325e8fdb18/1626387168193/28969972833.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90297db8bb141bad830f7/1625883288083/bsc_nursing_4_year_question_paper.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2da68feeeb055d98e6ce/1626221990472/xijatubezufopiwajanolo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f00905365a201d3c39d88c/1626343686175/52546979213.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec88800d838b6c850d6e9c/1626114176971/29457192207.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f11d21b3a282695d32bf70/1626414370114/sorelasataluro.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_off0000cf62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 16792 bytes
font_01_sfnt_off0000e779.bin
b9d3ee79e337af53b00fb463dc1efc8d48fcebe56f6c855ea4ad143ae11b9652
pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 10616 bytes
font_02_sfnt_off0000ffc1.bin
bc3dd762b4f0a4dd69c0892c7ac39e85f581687956025a7b8b9bb8e5fade54d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC1 16176 bytes