Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a41fcaf10f8505f…

MALICIOUS

PDF

67.0 KB Created: 2021-06-05 01:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5caf6a8dfeba4935750e4beabc1e316b SHA-1: 278419a98fec3b660c02faa73f560d56c5f8ee13 SHA-256: 4a41fcaf10f8505fe9e16af2c26b37f61ac4247c5ff96c22dd85e2a2cbe96c4c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. 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 'Teoria economica marxista pdf', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://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://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://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