Malicious PDF — malware analysis report

Static analysis result for SHA-256 8858b3e171f5f06e…

MALICIOUS

PDF

100.2 KB Created: 2021-03-16 05:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14ac1c495ed837cd0a233ece37fcc934 SHA-1: ed33270d5be0dae4fa2932eca6bec6ade4a5a9a6 SHA-256: 8858b3e171f5f06ed4c4461c5bb50420e10f2771f9882a87230d7d346cedfd02
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the overall heuristic firings suggest the document is designed to trick the user into navigating to a malicious site, potentially leading to further compromise.

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://pelibifir.ru/123?utm_term=gw2+skyscale+eggs+guide
    • http://raguvigawak.mypressonline.com/dell_venue_8_pro.pdf
    • http://lilozekakotelup.sportsontheweb.net/anker_keyboard_manual.pdf
    • http://fapepewakidij.22web.org/dremel_3000_kit.pdf
    • http://fesilax.22web.org/worksafe_victoria_hazard_identification_checklist_template.pdf
    • http://fezelegafefuv.mywebcommunity.org/dymo_letratag_xr_user_manual.pdf
    • http://kawasus.scienceontheweb.net/amarilli_mia_bella.pdf
    • http://wapividazofar.scienceontheweb.net/41939581005.pdf
    • http://kumajamefe.getenjoyment.net/game_theory_john_nash.pdf
    • http://devivitonewe.sportsontheweb.net/22663304073.pdf
    • http://zigejetulanoda.iblogger.org/pasos_para_hacer_un_estudio_de_caso_en_enfermeria.pdf
    • http://rijewomel.scienceontheweb.net/scag_turf_tiger_2_owners_manual.pdf
    • http://dipugipedanam.sportsontheweb.net/blast_furnace_process_control.pdf
    • http://fesurowejo.mywebcommunity.org/cours_excel_2020_debutant.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dalava/alter_ego_plus_b1_guide_pdagogique.pdf
    • http://devidazip.epizy.com/blepharophimosis_syndrome.pdf
    • http://vobulag.rf.gd/swiffer_wet_jet_pump_not_working.pdf
    • http://xapimiwosusuv.epizy.com/pogoledeberinar.pdf
    • https://s3.amazonaws.com/pibabopuduj/sasefezetulebij.pdf
    • https://s3.amazonaws.com/lopadivupudexa/breaking_the_chains_of_psychological_slavery_audiobook.pdf
    • https://s3.amazonaws.com/gizonukorad/electronic_fuel_ignition_system.pdf
    • http://lejibunigazaxa.epizy.com/31306106179.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_off0001487e.bin
78d62a1e2baf867855a4872a018c83290d99fc91ae266637a7e0b34a408e8cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1487E 5432 bytes
font_01_sfnt_off00015b3a.bin
ba13e7fbd742149ceb4f75e8cbf8c495d3085f886d5af705b5bc60b5f2f2d008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3A 11540 bytes

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