Malicious PDF — malware analysis report

Static analysis result for SHA-256 72512f55abdcaedc…

MALICIOUS

PDF

70.7 KB Created: 2021-01-26 22:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0cb35647fa4f3a22a9e7abed03402868 SHA-1: 11942cffff5ec5d05b4a373186dd5c7907bc749a SHA-256: 72512f55abdcaedc265f6914570c9296217b7fc6aba85be46fc695dd0f0bcf55
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'jacksth.ru', which 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 URLs suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=glow+in+the+dark+epoxy+flakes PDF link annotation
    • http://edevletorg.com/business_administration_degree_minor_in_accounting_jobssvxqg.pdfIn PDF document text
    • http://vesimawamom.66ghz.com/alphabet_worksheets_for_kindergarten_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gutuxegiwad/gdDeC8Y/wolf_appliance_repair_services.pdfIn PDF document text
    • http://legalvictory.group/52067983243k8x0k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381287/normal_600481897e7cd.pdfIn PDF document text
    • http://allfreebets.ru/fozinam4xjte.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/if3azON/kupepuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365661/normal_5fc9dbb3e54a1.pdfIn PDF document text
    • http://ukranews.site/movezejefedadolenukszdqi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485451/normal_5fe7a27b7f946.pdfIn PDF document text
    • http://vatologox.iblogger.org/zidavujovuzopidelasel.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/Ajeghfv/4756951358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5fe038ded036b.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/padosumifubobo/amravati_mandal.pdfIn PDF document text
    • http://gusubozavagu.epizy.com/acer_5750g_bios.pdfIn PDF document text
    • http://xovefepotulat.epizy.com/lorelufag.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/57276779591.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/xomafapevixugajupufivogaf.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/viper_snake_wallpaper_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/pharmaceutical_biochemistry_books_free.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_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 5488 bytes
SHA-256: dc8ff45c12439424d7ea57a4adae57a1ec68fc4677c14db4d0749f4f5b64464a
font_01_sfnt_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 11336 bytes
SHA-256: dd6814b7ba0ca61ac4763be52941f2e38710ced1ca5e7ac7144ebe514aa78be9

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