Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d697380445a7e4…

MALICIOUS

PDF

92.5 KB Created: 2021-03-12 15:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 450f1fa6278682a7fdebdd61f94ee285 SHA-1: d3aa5cbcfcaaf849e4aeab4ed62c9c2db43a2115 SHA-256: 50d697380445a7e47bf7364d4685f703634a670ddc0322b41ba292cc50f21a69
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://vilenefex.ru/123?utm_term=bharathiyar+songs+tamil+free, is likely used to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user interaction, aligning with spearphishing tactics.

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://vilenefex.ru/123?utm_term=bharathiyar+songs+tamil+free
    • https://cdn.sqhk.co/xexodaxafu/hiighgz/candy_camera_hack_apk.pdf
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/nerudiwap_dobidawugevaj.pdf
    • https://wuliwedifa.weebly.com/uploads/1/3/4/7/134753749/sasuvimo.pdf
    • http://vuwimoxit.mygamesonline.org/bitijovomadowokoziwa.pdf
    • https://giwuvapelefawi.weebly.com/uploads/1/3/4/8/134869604/jowotifuzo.pdf
    • http://dedotiroviwef.22web.org/bootstrap_form_multiple_sections.pdf
    • https://rebasikerebevo.weebly.com/uploads/1/3/4/0/134016880/wufebil_likinurapekewil_bipakepot_denapireruma.pdf
    • http://wizapivizesib.mygamesonline.org/96536810743.pdf
    • http://gomigapujasep.sportsontheweb.net/busaporu.pdf
    • http://lezigovedavide.getenjoyment.net/the_boy_in_the_striped_pajamas_movie_rating.pdf
    • https://cdn.sqhk.co/zuronenom/jXdzh1t/zazumisamadi.pdf
    • https://cdn.sqhk.co/lijuwezasip/fjdjaMi/blocky_highway_apkpure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://madulisi.epizy.com/rebimivavilejinufobuga.pdf
    • http://mawabubobiniz.rf.gd/audible_books_to_pc.pdf
    • https://s3.amazonaws.com/tanikanaw/lixixonofosemuv.pdf
    • http://zodabozaloti.rf.gd/manual_normas_apa_sexta_edicion_2019.pdf
    • https://s3.amazonaws.com/viboxikuz/german_genitive_case_exercises.pdf
    • http://xowilewegiwo.myartsonline.com/singer_golden_touch_and_sew_750_bobbin.pdf
    • http://duvodix.myartsonline.com/49753300091.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_off00012076.bin
f69ea87f0f813ef7fba34a7a95840c55fb886427d2484023170bacc20f05097e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 5120 bytes
font_01_sfnt_off000131b8.bin
42668fd0be58798ccfcf0538adb9e67076a5ceee6980070482196655f9b74cdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x131B8 11088 bytes
font_02_sfnt_off000156c7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x156C7 4324 bytes