Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bed9d6dcfc1827…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 21:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 12895bc1e6e268246b788cd7ad80dcf0 SHA-1: c58d9ca88e1d34bab9d991c551c3bf08732c715e SHA-256: f8bed9d6dcfc1827a49e5143b2aa8984afecb4507d5bc9c039097c121c6927e2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to disposable domains and acting as link farms, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vr-spagna-20.effievirtual.com/galeria/files/xatukasawevaxako.pdf In PDF document text
    • http://mindatpeace.us/uploads/files/mopegomav.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/64353596022.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b6cfefc61---36599854155.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/43617829975.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f1cf08cacf628808a0e793028be9ffcb/vofofuxiwa.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/zaximavanefubipodanekobed.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/mufutazevisenogunala.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/59714557174.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/midof.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/kexumivojimun.pdfIn PDF document text
    • https://qkon.ca/images/file/31079318349.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/40031831433.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/satadetu.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/87247768953.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/reketadozaz.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/jikubiwisura.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/36944866338.pdfIn PDF document text
    • https://salwangurugram.com/files/96542383831.pdfIn PDF document text
    • https://clinicscrm.com/img/files/79651122734.pdfIn PDF document text
    • http://brandorbit.in/userfiles/file/soromatefalonegemutupup.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/zotufitugofug.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/88087049827.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/46305497639.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/zuvaxufovolaruborimofowi.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/xukabot.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/28293868620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=jarvis+artificial+intelligence+pro+apk+download+freePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 11032 bytes
SHA-256: d1b6104c2f86628090be39e960642bfc9c4a2ec6c7cb21792d067f5b651cb839
font_02_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 18564 bytes
SHA-256: 8ffb13bad88fbaca08ccbd058929fe8eb20fde0ccb1b6e80cce9d5cff0122874