Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3b9484c5bda904…

MALICIOUS

PDF

68.3 KB Created: 2021-03-29 13:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2de3b0dc7bcd3a7a802b8adc7b9165b SHA-1: 18a0d5dc6914f137258159c4dc1496ef90da23cc SHA-256: cd3b9484c5bda904c95e2beb2a22324fc9b40077bcf2f6b023a3ccf8d4a0e1b2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to sheet music, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of external URIs indicates a potential download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=beethoven+moonlight+sonata+easy+piano+sheet+music
    • http://uablog.website/2_types_of_cochlear_implantation8of3y.pdf
    • http://idealica-italiaofficial.site/definicion_de_arritmia_cardiaca975zp.pdf
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5fec3d7570e4e.pdf
    • http://timelessdecorum.com/parabody_ex350_partsq6r2f.pdf
    • http://letnesil.xyz/how_to_describe_poetry_in_your_own_wordsdo8p0.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/8718919.pdf
    • https://cdn-cms.f-static.net/uploads/4388420/normal_604ceb8d97beb.pdf
    • http://zixutonin.iblogger.org/refomazutawujufosijesodeg.pdf
    • http://sberbank.services/first_cell_height_calculationr97rp.pdf
    • http://nuverlites.online/nitoxokibir0nxwp.pdf
    • https://cdn-cms.f-static.net/uploads/4414672/normal_600c37cc163ad.pdf
    • https://cdn-cms.f-static.net/uploads/4462056/normal_6044d8fb6feac.pdf
    • http://topdouche.xyz/avengers_3_trailer_free_sabwap._com8aia4.pdf
    • http://blancop.xyz/courage_under_fire_movie_free7o9ju.pdf
    • https://cdn-cms.f-static.net/uploads/4462350/normal_5fdc5f0bbf60c.pdf
    • https://mesikanuxiruk.weebly.com/uploads/1/3/1/6/131636832/90b060912.pdf
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/7f43f19d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wupixufekijax/wupenuwuwapuzivewopo.pdf
    • http://kebafitesulodu.epizy.com/answer_interview_questions_you_don_t_know.pdf
    • https://s3.amazonaws.com/xozeb/game_boboiboy_hack_apk.pdf
    • http://viwapuzajor.epizy.com/3418671270.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_off0000cd1c.bin
4624f93e320f2141cf2c9e29d4313f190a923ef87da29b2f4b13a02686356613
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 5464 bytes
font_01_sfnt_off0000dfa2.bin
01fb335a6875d3415d77b039d68e2fe03f52817df8bc9e12a81742fe721b0b31
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 10532 bytes