Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be168d795b804bd…

MALICIOUS

PDF

83.1 KB Created: 2021-09-17 18:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e881f61a4efb91014929d12cb8663150 SHA-1: 89e6b0284a8ebc54fe977a9311e3ff0b7e3bb09b SHA-256: 0be168d795b804bd9a295a87f446e0b8095edbf19a78f083425c2bf9e42dd923
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs and a link farm heuristic suggests an attempt to redirect users to malicious content or phishing sites. The 'Password-protected archive lure' heuristic indicates the document likely contains instructions to download an encrypted payload, a common tactic to bypass security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://infrive.ru/uplcv?utm_term=my+stupid+boss+full+movie+online+free PDF link annotation
    • http://swotaweb.com/img/upload/file/47060648681.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/15887210538.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/dde582d3d1cbba5352f173fb312acb34/tuxefa.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/bawijozinemogilafuze.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/81844110998.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/81950793849.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/mibepotigeza.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/merireronerajodoto.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/pawekonabalu.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/vabijenup.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/ziwebida.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/94330492013.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/sujezava.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161409416ba51b---fividam.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/58334874256.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/92962312757.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/kegojikeroliretegur.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/31184485192.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/jizaveri.pdfIn PDF document text
    • https://mytshirtcreator.com/app/webroot/files/file/99121189470.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/zojojupakegebevex.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/norinadoxuxa.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://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_off0000e1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 10908 bytes
SHA-256: d9f7f4b06479dab249babb1315a5e953b3d4a94cd573aff27933a5b9fa6821f8
font_01_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EB 16940 bytes
SHA-256: 5d95e879101292d80cc2932684574ce86d73e7ae72e53fcb77a35d243b5d8aef

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