Malicious PDF — malware analysis report

Static analysis result for SHA-256 4674be9af3cda90a…

MALICIOUS

PDF

91.3 KB Created: 2021-04-24 19:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3df555cbc4ec36f0a208abf6ffda776 SHA-1: 62c42e9b8634d21be9290afe436b203a073dbdf1 SHA-256: 4674be9af3cda90ad7e3083c3ed20c56ee8b9bfd93efcbea8d6b2a42a97103c3
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, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/strik?utm_term=delonghi+magnifica+esam3300+review
    • http://mamewebifukuv.22web.org/campos_de_la_psicologia.pdf
    • https://cdn.sqhk.co/norowitidot/hZZlvQZ/animal_sounds_song_mother_goose_club.pdf
    • https://cdn.sqhk.co/pogadidotilu/ichd8jm/64319591500.pdf
    • http://hhizmet.com/clawbert_spell_words_2020_octoberes4zf.pdf
    • https://static.s123-cdn-static.com/uploads/4472213/normal_6000b09ecfd58.pdf
    • http://usesalle.xyz/what_does_it_mean_when_your_emerson_tv_wont_turn_ondb7gl.pdf
    • http://rrrrkkkkk.space/cyber_hunter_android_apk_datakiq8u.pdf
    • https://cdn-cms.f-static.net/uploads/4369153/normal_60325e8d5da9a.pdf
    • http://drnextact.xyz/jaxavapofapafojujafejs3vm.pdf
    • http://kungfumalibu.com/kikitiwugezeso1hwgs.pdf
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5ffc2c040164b.pdf
    • https://cdn.sqhk.co/kepigofunet/fhibBZf/17147125373.pdf
    • https://cdn-cms.f-static.net/uploads/4419836/normal_60246b8edd300.pdf
    • https://cdn-cms.f-static.net/uploads/4469116/normal_601739484d9d3.pdf
    • http://banodos.iblogger.org/worksheet_conditional_sentences_spanish.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://relilirijupike.epizy.com/vcds_12._12_windows_10.pdf
    • https://s3.amazonaws.com/jufowokedunod/balancing_equations_practice_worksheet_2_answers.pdf
    • https://s3.amazonaws.com/sevoga/is_storm_kings_thunder_good_for_new_dms.pdf
    • https://s3.amazonaws.com/mutirexa/john_g_lake_books_drive.pdf
    • http://butojoboxorak.epizy.com/biomass_gasification_and_pyrolysis_practical_design.pdf
    • https://s3.amazonaws.com/vuzufexarevima/xomuwofodubop.pdf
    • https://s3.amazonaws.com/dufekifaral/formulir_klaim_asuransi_kesehatan_manulife.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_off00010c52.bin
0cc8f0c87c4b21cb5e1a6f21c7d79281ffca27d7941b1a212e491bf12903b8fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C52 5460 bytes
font_01_sfnt_off00011eba.bin
8dd329069215814af475c312b449b95ccc50403c30e6e69431652cafa482a0f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBA 21216 bytes
font_02_sfnt_off00014fde.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDE 4324 bytes

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