Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8c2bb596594063…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 17:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fd82faf95315a7030070bcaf2200742 SHA-1: 2df021f6c28af54b685c0ad586bba90016805bf9 SHA-256: 9b8c2bb5965940632dfb38911232dd74eadf36934b58460b46282aeffabfecb0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to professional development, likely to trick users into clicking the malicious link.

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://resalured.ru/strik?utm_term=how+to+write+smart+goals+and+objectives+for+work
    • https://wajupera.weebly.com/uploads/1/3/4/7/134763514/7724382.pdf
    • http://kepamusujuboza.iblogger.org/ad_plus_apk_pinjaman.pdf
    • http://naluwuzamo.22web.org/auto_mouse_and_keyboard.pdf
    • https://cdn.sqhk.co/petebeki/hjOaid2/ar_zombie_shooter_survival_game.pdf
    • https://rolemefusibo.weebly.com/uploads/1/3/0/8/130814279/9073640.pdf
    • https://cdn.sqhk.co/sekigizakeku/ifhc35D/janemafi.pdf
    • http://xuvepawa.iblogger.org/39271681964.pdf
    • https://dubakaxejevam.weebly.com/uploads/1/3/2/6/132696109/monupefil_xorujukusulero.pdf
    • http://desazunipoxi.22web.org/ayushman_bharat_hospital_list_in_bangalore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zejawira.rf.gd/glencoe_mcgraw_hill_algebra_2_answers.pdf
    • http://zogupavufun.epizy.com/saxibojorofilokeje.pdf
    • http://gasigigi.rf.gd/messenger_app_for_android_not_working.pdf
    • http://winibivazizi.rf.gd/49336490205.pdf
    • http://xugekevilop.rf.gd/bugapediluvosikukado.pdf
    • http://zotinebid.epizy.com/elliptical_arch_formers.pdf
    • http://watekiz.rf.gd/how_to_use_google_my_map.pdf
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_4c33ff015b204ebf814c98f48eb5b44a.pdf?index=true
    • http://fibajufe.rf.gd/duvofububuriminux.pdf
    • http://wazuvolixevafo.rf.gd/waste_to_energy_meaning.pdf
    • http://xekivigevu.rf.gd/biology_notes_form_one_free_download.pdf
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_8343a207bd4544e082a8c5d5566ba333.pdf?index=true
    • 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_off0000f5e6.bin
128558e39d53a3aff5ee55bb6d8856ac3dcb3490ea20a958b13564c744de2f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 5736 bytes
font_01_sfnt_off00010974.bin
1fdee84228fd550174a52af200303e1f0a7d29e5ce254d8b7cc04b393b83c36a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 11012 bytes

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