Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f664b23ad2c07d…

MALICIOUS

PDF

79.9 KB Created: 2021-02-22 19:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d572532246d33c480c17c4058cfe5a72 SHA-1: 19c056b51fac302425207ebe5de6df6fb110d1d0 SHA-256: b5f664b23ad2c07dd3b7625e02c184ef27216ac1816294c14de18770ad34179c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=azar/grammar%20exchange%20companion%20website PDF link annotation
    • https://zemotererozo.weebly.com/uploads/1/3/0/7/130738962/8cca6ed.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/6182234.pdfIn PDF document text
    • https://cdn.sqhk.co/zesuxetirano/hijfv7o/86778849032.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/bqgcMgd/civil_war_surrender_april_9_1865.pdfIn PDF document text
    • http://parhelifrl.space/global_citizenship_definitionom311.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/90954848122f5fmn.pdfIn PDF document text
    • http://rubisteq.online/how_to_setup_cisco_dpc3825jwcci.pdfIn PDF document text
    • http://braco.ru/battlestations_pacific_formation_settingsanc5x.pdfIn PDF document text
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/dufido.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/ccdfbe3297a9b.pdfIn PDF document text
    • http://lifegirls.site/the_jungle_upton_sinclair_worksheet_answers2dskf.pdfIn PDF document text
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/zekizozazedawu.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/DhahdLZ/rockauto_auto_parts._com.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimunofat.epizy.com/best_fish_aquarium_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/audubon_nj_police_reports.pdfIn PDF document text
    • http://telewazikenap.rf.gd/61471512180.pdfIn PDF document text
    • http://girifej.epizy.com/71675689144.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/dedupeza.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/40446842154.pdfIn PDF document text
    • http://salesog.epizy.com/532694175.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_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 5688 bytes
SHA-256: f19da75a6fbd6e141d84aedeb537a493d0c3e82e43e2032fe04cfd332f1a0fc2
font_01_sfnt_off00010edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDB 10272 bytes
SHA-256: e636fd958ac4086d898cd87b663536b227a46c26e2ae5555ad6dbf24d8a0931a

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