Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c5f8f90260d759…

MALICIOUS

PDF

69.3 KB Created: 2021-09-30 23:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7c4bc3890eb218fa4836c89d1b1ed655 SHA-1: 7a0cd6df5955318c1721d008953e6ba9c776cc1e SHA-256: 60c5f8f90260d7597c8de102603a3ce545cd6d7da657a17f9cbd57310b42a0aa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to potentially malicious websites. The presence of JavaScript suggests an attempt to execute code within the PDF viewer, likely to facilitate further compromise or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://infiniti.e-library.tw/uploads/files/dasarijapuwimusipelazug.pdf In PDF document text
    • https://alev.az/userfiles/file/kaliwowapixaba.pdfIn PDF document text
    • http://korytnica.net/data/files/79101723288.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/molexawi.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/newewusitix.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/vokereruw.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/7126839357.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/kijomoji.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/19937300985.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/9bc10579ed1a509e0cad4ccb9f67a225/putitoveb.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210928232240.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/4680379924.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/84751810433.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/rinuzobofikabef.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/kosifelowisibalugukuriwos.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/84390576719.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/10094362103.pdfIn PDF document text
    • https://maisonfamillesrimouski.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/kewodepiwobutixavakuke.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/fukerezapuju.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/towufe.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/gajatafulipogemitug.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/gileribisujiposeseme.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/70488798568.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/54710634166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=download+lego+star+wars+tfa+full+versionPDF 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_off0000aecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECB 10784 bytes
SHA-256: 0dcf63dff333da7277e37f9c61144b33c6c98013f4d6b47c7ac5f5a5d8d4ccf3
font_01_sfnt_off0000c79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79A 15532 bytes
SHA-256: 30a94a8ed5a88b1c4f2283f1a74bdd8a82bbbfadc419db19637f43a85c5361b6
font_02_sfnt_off0000ef1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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