Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f71854290bf0a1…

MALICIOUS

PDF

89.3 KB Created: 2021-03-13 16:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bd666d7719e78caed7f2cfd46c9e6c2 SHA-1: 4938ca48ff7229871aa687df57b63b223aca080d SHA-256: 87f71854290bf0a1fe609919bb34f21e947946f5625736b5ac11939963264abe
96 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to potentially malicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs suggests the document is designed to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/award?keyword=cbse+syllabus+class+10+2020+all+subjects+pdf
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/dagisex.pdf
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/dbb1b57.pdf
    • https://cdn.sqhk.co/tuseliwi/ibifH4J/rawepaj.pdf
    • http://vizazovabula.mywebcommunity.org/abundance_now_book.pdf
    • http://bestrongbyg.com/the_book_of_beasts_e_nesbityt5rh.pdf
    • https://cdn-cms.f-static.net/uploads/4417648/normal_603fb43987691.pdf
    • https://static.s123-cdn-static.com/uploads/4374203/normal_6006f0c1beb2c.pdf
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/gemor_nofenoxavulijo_ziwize_tasotabip.pdf
    • https://cdn-cms.f-static.net/uploads/4403263/normal_603e3dd4c212c.pdf
    • https://cdn.sqhk.co/dikizumi/ge1nicF/adobe_reader_8._1_2_portugues.pdf
    • http://pinenud.mygamesonline.org/catholic_catechism_book.pdf
    • http://kakafeg.scienceontheweb.net/hp_probook_4530s_battery_price_in_bangladesh.pdf
    • http://vidclips.design/9889352250460glt.pdf
    • https://bimovuwun.weebly.com/uploads/1/3/4/7/134727863/9357750.pdf
    • http://pokinusuvato.getenjoyment.net/anemia_ferropenica_peru.pdf
    • https://cdn.sqhk.co/linidivez/6giRjiD/garasarasamugiw.pdf
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/0651a3.pdf
    • http://gepanukotex.getenjoyment.net/94026141979.pdf
    • https://cdn-cms.f-static.net/uploads/4494166/normal_604760ec196ca.pdf
    • https://cdn-cms.f-static.net/uploads/4477137/normal_5fe9478471431.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://guwaxilajoxeza.onlinewebshop.net/86488601224.pdf
    • http://gegurobaz.myartsonline.com/maxapelewolivoxapozanori.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ce4.bin
ab46c3c763a0070482ecbef10872f7211ec710fab60e0f7ce2f5caaf960604dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE4 5604 bytes
font_01_sfnt_off00012014.bin
c81f1d3a6bb918ae21b888ef0dca81f27e648fcfe2b94b0e5a392ff5994957d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 11176 bytes
font_02_sfnt_off00014661.bin
9046fa894f5395f271e64c47474bf2473b032a6f10c8112fbce7f1c146348df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14661 4420 bytes

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