Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59e46d2164c35b1…

MALICIOUS

PDF

88.0 KB Created: 2021-03-15 15:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4930d2dc161d8a6ed6a48ab7d45f197b SHA-1: e650d7c835d1d464f2e7962a57b49bb6505825a6 SHA-256: f59e46d2164c35b19ac2fab14e6395541dcf7369a754124e772904c7ed6f90c3
104 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a URL that appears to be part of a phishing lure, using 'signs and symptoms of hepatitis b pdf' as a keyword. The document body, though heavily obfuscated, contains text related to hepatitis B and PDF metadata, suggesting a social engineering pretext to drive users to the malicious URL. No scripts were extracted, but the presence of external URIs and the phishing lure strongly suggest the PDF is intended to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/award?keyword=signs+and+symptoms+of+hepatitis+b+pdf
    • https://cdn.sqhk.co/suxavawudomo/shcjfgc/ajax_form_submit_bootstrap_modal.pdf
    • http://vowewudimo.mypressonline.com/stored_procedure_in_sql_tutorial_for_beginners.pdf
    • http://ribefiraxoto.iblogger.org/vokemimusedozufepekobaju.pdf
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/gilem.pdf
    • http://bomepufibawil.scienceontheweb.net/les_collectivits_territoriales_au_sngal.pdf
    • http://zukoretevir.medianewsonline.com/54452418507.pdf
    • http://fajufoturesu.sportsontheweb.net/97485466648.pdf
    • http://nokojatagi.mywebcommunity.org/acer_aspire_one_722_specifications.pdf
    • http://winoxolupuvil.getenjoyment.net/how_to_get_better_mpg_5.9_cummins.pdf
    • https://sotasoniwolog.weebly.com/uploads/1/3/1/6/131637806/pakulipafujobuk.pdf
    • http://mavaxur.mywebcommunity.org/pimaxaxoxosafamewaxut.pdf
    • https://cdn.sqhk.co/zatovafer/52hjjfD/juxalesinam.pdf
    • http://zukesijinizik.mywebcommunity.org/gilabejekefewexowoweweg.pdf
    • http://vegifeda.mypressonline.com/gowiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rugeritubaduw.epizy.com/xalakawalukojawidag.pdf
    • http://lijowavatajo.myartsonline.com/nobilojovorizo.pdf
    • http://rikutugaxugapib.epizy.com/19432708690.pdf
    • http://tulajadulixo.myartsonline.com/30061573553.pdf
    • http://bepolujogox.atwebpages.com/serato_dj_pro_software_price_in_india.pdf
    • http://vevurikadi.epizy.com/consumer_buying_decision_making_process.pdf
    • http://xalanijowule.rf.gd/libro_ciencias_2_fisica_secundaria_santillana.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_off000119e7.bin
5fcd6838fb1d3df069fe05445fe84f4ff4734973e3aec756c01e75b018e66a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E7 5672 bytes
font_01_sfnt_off00012d13.bin
2d3b7d11b75ef03a4f58c60befdad4f8bbd14e02bbf82a29b64c55de9cab201c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D13 11292 bytes

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