Malicious PDF — malware analysis report

Static analysis result for SHA-256 9840b4e114fed7be…

MALICIOUS

PDF

86.7 KB Created: 2021-03-26 07:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edab551bd9108bfe44f29d7d2843d73 SHA-1: 2fb698851b7b11913bef3db674427a3a2ca5fc48 SHA-256: 9840b4e114fed7be3d9b5405dd1815a47c908790370bbe324415dd240f58299d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a high-severity ML classifier and a specific rule for advance-fee scam lures. The document body, though partially obfuscated, contains elements consistent with such scams. The primary IOC is a URL pointing to a suspicious domain, likely used to host further malicious content or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/strik?utm_term=what+is+object+orientation+explain+with+example
    • http://tunulawofu.iblogger.org/april_2020_telugu_calendar.pdf
    • https://cdn-cms.f-static.net/uploads/4380682/normal_60184cdabb7b6.pdf
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/wunix_mabukikizisi.pdf
    • https://cdn-cms.f-static.net/uploads/4426812/normal_605b15720ae0c.pdf
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5ff8fcc1b1630.pdf
    • http://nolubebizufusim.iblogger.org/apa_citation_style_format.pdf
    • http://kumujobu.iblogger.org/hitachi_ultravision_tv_55hds69.pdf
    • https://cdn-cms.f-static.net/uploads/4387931/normal_60268e413dcf4.pdf
    • https://kebewizopega.weebly.com/uploads/1/3/4/6/134653356/puxamibi_jefisolopevorub_minuzelegepowi_mesunezogenodin.pdf
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5fcf85522969a.pdf
    • https://wazidufadik.weebly.com/uploads/1/3/0/7/130740116/fizudomividosaza.pdf
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fc93a3534b67.pdf
    • https://cdn-cms.f-static.net/uploads/4446759/normal_600f050193876.pdf
    • https://cdn-cms.f-static.net/uploads/4481154/normal_60196d2f1e083.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://megutid.epizy.com/bosch_season_5_episode_guide_wiki.pdf
    • http://lufogadiza.rf.gd/gefuwag.pdf
    • https://s3.amazonaws.com/jixeremipet/59931586165.pdf
    • http://depevabevidot.rf.gd/how_to_check_page_size_in.pdf
    • https://s3.amazonaws.com/tawosutosuxi/how_many_samsung_models_are_there.pdf
    • http://tivezobew.rf.gd/30986983021.pdf
    • http://gelulunex.epizy.com/fazuzu.pdf
    • http://leligikolapib.epizy.com/using_cpctc_with_triangle_congruence_worksheet.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_off00010ff8.bin
37c3182cdf66d540cd3d97bd996477440df27f207aa990215f696ad84adc68b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 5564 bytes
font_01_sfnt_off000122d3.bin
91fddefa186eebc07efa7febf929d55dfa3573855094d3f9cc1562934fd2a313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D3 11952 bytes

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