Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b97bea458611ca…

MALICIOUS

PDF

63.9 KB Created: 2021-06-05 01:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4dcfad98869ab86b0fa6e6ca0812f06 SHA-1: 6435ee3fad55975214e1be90b216fc27cfb76191 SHA-256: c0b97bea458611cac5e0ae4cb4796930b16f62dbe24ceb915d8d9aded5307701
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious URL, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to economic theory, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9815

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://krisoc.ru/pbw?utm_term=teoria+economica+marxista+pdf
    • https://livorenofog.weebly.com/uploads/1/3/1/1/131163774/domori.pdf
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff17076c8280.pdf
    • https://cdn-cms.f-static.net/uploads/4424376/normal_601304c81f4ff.pdf
    • https://cdn-cms.f-static.net/uploads/4388046/normal_602ae152dbb7b.pdf
    • https://cdn-cms.f-static.net/uploads/4371791/normal_603a77c8eddc9.pdf
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/sitegep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jiboduxoguv.pbworks.com/f/wuxujuwowukel.pdf
    • http://tujedet.pbworks.com/f/xuvixunamobewamipi.pdf
    • http://bofamawetodo.pbworks.com/f/what_happens_if_you_workout_a_lot_but_dont_eat_enough.pdf
    • https://uploads.strikinglycdn.com/files/366f30ed-f69e-4b35-865a-5ae6d067064d/1972_cessna_182p_parts_manual.pdf
    • http://japomajuxire.pbworks.com/f/kazusifir.pdf
    • http://zowonixepor.pbworks.com/f/pltw_3.3_1_synchronous_counters_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/c60083f7-fef1-4cb6-9ff0-070ffb7442df/how_to_fix_sd_code_on_whirlpool_cabrio.pdf
    • https://uploads.strikinglycdn.com/files/89c4a15e-6c30-4daa-8e07-36a568ce6b02/addition_and_subtraction_of_decimals_worksheets_grade_6.pdf
    • http://didaneguk.pbworks.com/w/file/fetch/144425175/tanujivupelitovimadop.pdf
    • http://vikowezanipe.pbworks.com/f/15903780926.pdf
    • http://wufamazajo.pbworks.com/f/togufovisikuluju.pdf
    • http://didaneguk.pbworks.com/f/wipobogofutamuxelulunebip.pdf
    • https://uploads.strikinglycdn.com/files/ea4f8dae-c653-4a67-ac51-c5711c33c6ce/what_is_central_auditory_processing_disorder_capd.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c648.bin
1908a78f96249e864b014f8edcf061548412a668949ad4c57aeeb38674d7426e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC648 5284 bytes
font_01_sfnt_off0000d82b.bin
365a8e3aed748823cf49bcd0cc938155f53174d6a9e5259cfcee829ebda13c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 11916 bytes

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