Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c4ee420a54a3f3…

MALICIOUS

PDF

78.8 KB Created: 2021-04-03 13:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41d794f679e350f50f4441711bff9731 SHA-1: 94c930c69f002f90a951ff62b159f65b364d8a52 SHA-256: 31c4ee420a54a3f39d0d8f84a1c0150494b09f26f96ee6abbddfe95aec2742a2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=amazfit+manual+cz', suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jacksth.ru/wix?keyword=amazfit+manual+cz
    • http://nugekurobeju.iblogger.org/quotation_template_doc_free.pdf
    • http://linufiwanekume.scienceontheweb.net/bosquejos_biblicos_de_los_salmos.pdf
    • https://povurekeziduzeb.weebly.com/uploads/1/3/2/7/132740384/fewemekalipadi_jumam_guxuxoliwasedok_zubejatif.pdf
    • https://cdn-cms.f-static.net/uploads/4376870/normal_604e69237716c.pdf
    • http://xutifufaxe.mypressonline.com/adalat_bula.pdf
    • https://zumusikibalagop.weebly.com/uploads/1/3/4/0/134096359/tunisedonas_darenobaneboni_pexevojop.pdf
    • http://smartbright.club/fevoxugejesadomimegowor799hs.pdf
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/semudoxu-kewujirafufot.pdf
    • http://kosiwixiwumizu.iblogger.org/lord_of_the_flies_chapter_9-10_questions.pdf
    • http://meetporte.xyz/pearson_matlab_for_engineers_answersdfqlr.pdf
    • http://wide-do.top/sci_journal_list_2019_excelz08ia.pdf
    • http://meriline.store/jefavonelokixerunironazu9qp6o.pdf
    • http://pimifawimonidij.mywebcommunity.org/pixma_mx430_driver_download.pdf
    • https://wafodefa.weebly.com/uploads/1/3/4/4/134480145/lasegumojorefe_lelakujunapasi_sukevuve_diretopebuvu.pdf
    • http://fomuvegikutidob.iblogger.org/windows_10_64_bit_gratis.pdf
    • https://static.s123-cdn-static.com/uploads/4412382/normal_6001d87d84453.pdf
    • http://pedugubugof.mywebcommunity.org/29920472153.pdf
    • https://static.s123-cdn-static.com/uploads/4496148/normal_6004f5f8c6b85.pdf
    • https://static.s123-cdn-static.com/uploads/4465949/normal_6000af7928fcc.pdf
    • https://static.s123-cdn-static.com/uploads/4492546/normal_5fe45f4634e9d.pdf
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/9721525.pdf
    • https://cdn-cms.f-static.net/uploads/4459469/normal_5fd63fa43ee61.pdf
    • https://cdn-cms.f-static.net/uploads/4391013/normal_6025ace0a189a.pdf
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5ffe499f15c33.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gabitotedusaled.epizy.com/zemosakirowadodifet.pdf
    • http://mijewuwusos.epizy.com/92604621353.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_off0000f64e.bin
f3054ffe3da65f7cfc7d7c2d8c2394ad18d5f41e35c45fec4183437bc39f421c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 4792 bytes
font_01_sfnt_off00010696.bin
1400c8a55ffd61551a6319dd34a3e1a227820110e275b72ef7d97889b7a760d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10696 12780 bytes

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