Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9ddf97e1ee9e71…

MALICIOUS

PDF

74.8 KB Created: 2021-04-18 20:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c2d855e6529fb7bc7f280db2528693a SHA-1: 70c3b2a4279414f11ee4888036e8c7d5c674a16d SHA-256: 3c9ddf97e1ee9e711f6feac81c66d5879ecdcbd3a9ebf548ee19778b5afcdd05
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a domain that is likely part of the phishing infrastructure. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to trick users into visiting a malicious URL, likely for credential harvesting or further malware delivery.

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://resalured.ru/strik?utm_term=judo+basic+techniques+pdf
    • https://cdn.sqhk.co/kupawusel/jdcjie2/mijelizixujafiziv.pdf
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5fe9287767285.pdf
    • https://cdn.sqhk.co/nipigagavadu/ifidTgf/wexoledegefezojosapiziwu.pdf
    • https://cdn.sqhk.co/bitizulokiva/vljiqla/jovezazunetizikizerito.pdf
    • https://cdn.sqhk.co/loganidob/Dghdhd5/airbnb_near_me_for_parties.pdf
    • https://cdn-cms.f-static.net/uploads/4466366/normal_604042f3298d4.pdf
    • http://zebiripu.mygamesonline.org/sufekabigajojoxakodowo.pdf
    • http://bowoporoj.iblogger.org/abraham_hicks_books_free.pdf
    • https://cdn-cms.f-static.net/uploads/4388060/normal_603c155835c83.pdf
    • http://suvafedam.iblogger.org/date_format_uk.pdf
    • http://zanapipok.getenjoyment.net/new_additional_mathematics_textbook.pdf
    • http://tudovawo.22web.org/goulds_well_pump_guide.pdf
    • http://pagavopalubutu.scienceontheweb.net/53567330405.pdf
    • https://cdn-cms.f-static.net/uploads/4470385/normal_601ddaab50d62.pdf
    • http://nibewubixela.getenjoyment.net/carbohydrates_fermentation_test.pdf
    • https://cdn.sqhk.co/kojupiloxifi/gjE0jjx/fishing_boat_livewell_pump.pdf
    • https://cdn.sqhk.co/padixemugex/KGtdtgd/zunitoredevonumafotu.pdf
    • https://cdn.sqhk.co/soziwariru/d5LhjKT/hollywood_grape_escapes.pdf
    • https://cdn.sqhk.co/toralapiluw/iDmgfbB/5518680928.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juwebud.epizy.com/tozarotuxututogexonokevef.pdf
    • http://gidepajujida.rf.gd/vujezap.pdf
    • http://bejovivijif.epizy.com/62912461212.pdf
    • http://sorisavitekinuj.onlinewebshop.net/aoac_official_methods.pdf
    • http://misutiwovodifid.rf.gd/filehippo_editor.pdf
    • http://rukukuwozar.epizy.com/rumisubeforegunidep.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_off0000e6a5.bin
46beed5bff371d9322185dec60c6d8385048c4b96633b6607cebca92168a95f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 5368 bytes
font_01_sfnt_off0000f8e4.bin
a72561809c513c69a2fdaf98ac02b34b98ccfba330c959e7c121b998fb4e85cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 10824 bytes