Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6df4a9ffdc99ee2…

MALICIOUS

PDF

80.7 KB Created: 2021-03-30 22:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f06ff3aabfcee8fb5d7199f371934470 SHA-1: dc1158135e08d8098362c19b850e69ba9b26c96e SHA-256: d6df4a9ffdc99ee2a8ae78b9d2fe5122509b95c3033a2005804020f8a21b0875
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI. The embedded URL `https://vilenefex.ru/award?keyword=full+spanish+english+dictionary+pdf` suggests a phishing lure related to an award. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL point towards a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=full+spanish+english+dictionary+pdf
    • http://luchdobro.site/72284020161qqooi.pdf
    • http://nutupiwerumad.66ghz.com/33943929484.pdf
    • http://kvyovk.xyz/algoritmos_ejemplos_resueltosgh9ls.pdf
    • http://tizezs.xyz/jitevaxexeganubobt34i.pdf
    • http://blubadgehelp.net/lorolekenoxidoxowerib2n01b.pdf
    • http://5gusevshop.space/welifokow2wifs.pdf
    • http://baranaydin.org/can_a_wood_burning_stove_heat_the_whole_houseb7qx6.pdf
    • http://ig-copyrightnotice.com/water_slide_3d_vrg2vb5.pdf
    • http://b4shop.icu/al_quran_academy_london_bangla_qurantlezc.pdf
    • http://parhelifrl.space/lenovo_thinkpad_t430_memory_replacement5hpp2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://noxebujo.epizy.com/gomotorewepoxejiwegiwemix.pdf
    • https://s3.amazonaws.com/vukumesoj/age_of_empires_2_cheat_sheet.pdf
    • https://s3.amazonaws.com/lizuseguwix/stratiform_cloud_rainfall.pdf
    • http://jilerixam.epizy.com/25041760602.pdf
    • https://uploads.strikinglycdn.com/files/fa924368-0176-4540-b9b4-1166ac4c64fb/math_puzzles_middle_school_printable.pdf
    • https://s3.amazonaws.com/kagedatabujo/iop_chartership_application_form.pdf
    • http://pivirujifija.epizy.com/gawabomuko.pdf
    • http://zigubogujivo.epizy.com/bronchiolite_chez_le_nouveau_n.pdf
    • https://uploads.strikinglycdn.com/files/d1d1bb58-241f-4446-bf53-c3eee251f041/79129298816.pdf
    • http://demunoj.epizy.com/votoputodeb.pdf
    • http://kezulixu.rf.gd/figonamiruwigo.pdf
    • https://s3.amazonaws.com/lofese/9496155861.pdf
    • http://jatuner.epizy.com/how_do_you_charge_a_petsafe_bark_collar.pdf
    • http://jogekofasi.rf.gd/is_wes_legit.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_off0000fd98.bin
b0fb9c4209a1adef2e9a3f2be5c0809392c34b40ac5e01af342b659afa119080
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 5472 bytes
font_01_sfnt_off0001103c.bin
40f57a76e5dbae3df20174ae4fdbb5aa08692ed1e0858875a7a9b87f7f6b94c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1103C 10724 bytes