Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd341ed5d558c62…

MALICIOUS

PDF

88.7 KB Created: 2021-03-13 14:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d27007c87045c5a3cf865384ec5a278 SHA-1: 7e11238fa9b13230d76a247d4bc91e2753c9121e SHA-256: 9fd341ed5d558c62f045c089124f36cbfb1b11b48cdef9eb692d8b6c1fc2904b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'vilenefex.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a technical specification lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/strik?utm_term=bear+cruzer+lite+specs
    • http://wamuvosuvebupa.iblogger.org/photoshop_cs5_free_download_full_version_with_crack_mac.pdf
    • https://cdn.sqhk.co/jurugaguvedu/ibhaEif/lokicraft_2_apk_uptodown.pdf
    • https://cdn.sqhk.co/gojinuma/EAmNhi0/sonic_riders_zero_gravity_download_free.pdf
    • https://cdn.sqhk.co/xaduwudixum/rhcjeMW/all_checked_checklist_shopping_list_to-_do_list.pdf
    • https://cdn.sqhk.co/xawobovuji/idihkhb/birdies_wings_crossroads_dallas_ga.pdf
    • http://lamorebeduzakoj.22web.org/44730681777.pdf
    • http://kebilosudo.22web.org/lumowojirakitolororu.pdf
    • http://lixuninipakimar.iblogger.org/shotokan_karate_kata_list.pdf
    • https://cdn.sqhk.co/fenazijeguk/hnxgg9s/nasiroro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/08fd07ee-57ee-4c9a-8605-8e841ceb8b47/bosch_800_series_dishwasher_with_crystaldry_reviews.pdf
    • https://uploads.strikinglycdn.com/files/6a8d663d-edef-46c1-905b-ab662a6808e0/25682086513.pdf
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_2bf46020a1ab4c868ace19de4dd9e90b.pdf?index=true
    • https://s3.amazonaws.com/gopuze/how_to_clean_an_hp_6500_printhead.pdf
    • http://sezifusina.epizy.com/46833020427.pdf
    • http://lebozid.epizy.com/mapfre_insurance_annual_report_2017.pdf
    • https://uploads.strikinglycdn.com/files/1bdfc11f-2f6f-4c61-8e85-c3bdd9e16d64/sports_illustrated_kids.pdf
    • https://s3.amazonaws.com/jipowumat/examen_ser_bachiller_2018_resuelto.pdf
    • https://s3.amazonaws.com/gotenukevepunin/lagu_bon_jovi_always_metrolagu.pdf
    • https://uploads.strikinglycdn.com/files/d6152bfb-bae6-44a0-bdcd-94e5d362fffe/pinog.pdf
    • http://kakedujeruvos.epizy.com/badlion_client_not_working.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/bhoot_wali_picture_movie.pdf
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_945d5d669add4f31a8078984290b710c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a24ecc76-56e1-4954-a29f-f0f6555764da/asus_rt-n12_password.pdf
    • http://bumumewevebav.epizy.com/zaroxadikufezuxem.pdf
    • http://dibixobijowib.rf.gd/95900894816.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_off00010ed3.bin
adaf419e002e6b5ef546e89ba113b2ce076b3eeb4450fc04253dd15d70d8bf4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 4692 bytes
font_01_sfnt_off00011ee3.bin
386927c0f8f5e5627570643e8c9651717ec1c96cb042880a6dce081a02d873e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 11376 bytes
font_02_sfnt_off0001457b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1457B 4324 bytes

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