Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f590940e979f1a…

MALICIOUS

PDF

76.9 KB Created: 2021-04-01 07:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1b6a3d0f634bcc8763b30b575bcae7c0 SHA-1: feaf3b7df7363f1037599584910dc2213157cc07 SHA-256: 06f590940e979f1a0c541e8e0678619f93ed982f0ccc54fe7004382720700221
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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://resalured.ru/award?keyword=past+perfect+tense+practice+pdf PDF link annotation
    • http://bivaxosufuxibo.mygamesonline.org/13502103363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_6020bd306dfff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_602d00858711b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_604cf18fbf64a.pdfIn PDF document text
    • http://gadokuzepot.22web.org/ragad.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/lazapejebonegutar.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/how_to_draw_a_graph_in_science_ks3.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/netgear_wnr2000_repeater.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_60120fdec83ee.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/mary_poppins_1964_cast_today.pdfIn PDF document text
    • http://pimegaxonubaz.22web.org/juvitodopixodikej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_6007e2bf67f33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xipavir/nevaton.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/westminster_chime_clock_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/barman_in_red_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/first_alert_3120b_smoke_detector.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/nespresso_capsules_guide_2019.pdfIn PDF document text
    • http://katufimeg.rf.gd/noluwujusobumajudubon.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/how_to_take_front_panel_off_frigidaire_affinity_washer.pdfIn PDF document text
    • http://notewewagegev.rf.gd/alimentos_transgenicos_y_cancer.pdfIn PDF document text
    • http://puwovejivu.rf.gd/counting_pennies_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/pirubedunabajirug.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 5116 bytes
SHA-256: 95662bea26bcf66ef6a53ed149cddadfb30630479195fbe91d76db4ae8de907c
font_01_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 10852 bytes
SHA-256: abc825eb80d93ce54f87f0442f993c97c7b2933e098c913896a3a5a20d07fb07

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