Malicious PDF — malware analysis report

Static analysis result for SHA-256 6691ba11505b0697…

MALICIOUS

PDF

92.8 KB Created: 2021-09-08 13:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8cc272244801ef4e9c267a94d7e6e3c8 SHA-1: d97d6c118baa5d017f97bd3872559a3db61ee312 SHA-256: 6691ba11505b06972f57f3cee77f358c87a708201582af26636d7508a914b0c9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The presence of JavaScript suggests an attempt to execute malicious code, likely to redirect the user to a phishing site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://2rent.gr/userfiles/file/77876688234.pdf In PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/3626937045.pdfIn PDF document text
    • http://www.pvvc.cz/files/65437799291.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/63501449681.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/zomilakuwurodijafulekir.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/kesavuwuwa.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/73022090575.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/50141314439.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/xoguzevekuxariwifega.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/xodidulutuxivoguzebuza.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/webexeridulifogixuk.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/rupaxigilasanuxuj.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/46647785337.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/93157532654.pdfIn PDF document text
    • https://endobible.com/userfiles/file/48067749741.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/zirefupa.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/13545825766.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/52550616186.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b66c1c9582b99abca7fa9c1a6d60738e/19818405611.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/35261557894.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/xopapukugadokopekeb.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613290f29f21d---ririkabibolenobe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=remington+pole+chain+saw+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 18400 bytes
SHA-256: 0917ec3dcc611d490ab5fbc6ece39a43b03c1089f8f2738f13876f13114b0037
font_02_sfnt_off00014ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD1 10952 bytes
SHA-256: 56a4da99c854dd2dbbd2b94085ed54241e979c06ed76f2a27ab343743b84c74e

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