Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d4a0d7f9a0b299…

MALICIOUS

PDF

81.4 KB Created: 2021-09-10 22:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5d2290698a53b179d7c35652afeefb52 SHA-1: aa4a99c3c09c4559fcd126850d22a048c031db88 SHA-256: 60d4a0d7f9a0b299cb9df2804cb0b3dd8fb971fe23d162056be209bf87b9bbc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter indicating a game mod download further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=download+gunship+battle+mod+apk+unlimited+money+and+gold+versi+terbaru PDF link annotation
    • http://virtualcharityevents.com/vce_cake/files/files/libavup.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/pekifon.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/39433316785.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/2746065483.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b38b4d9fd7---widetof.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/lijebuvo.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/monemixavo.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/47142284868.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/roraligixuzazowu.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/muredizajigufenipekovo.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/gakekogusobepimavafazi.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/97966574787.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/74983576016.pdfIn PDF document text
    • http://indexone.ru/upload/file/vemafaxupizetaduvoxapigu.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/14643627566.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/161326276509b3---xovikuvapesatuzidez.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161348de9b2108---jidoraxutedepubis.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/26428437040.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/gatitojutisunaxokugu.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/nukisawoketa.pdfIn PDF document text
    • https://slide-bearing.com/d/files/64885423508.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/238206695.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/xeravagupuzepopewoxuxodob.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/78739433750.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/9248938994.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_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 17476 bytes
SHA-256: a501bedb052ddeac7ff1b5eaf9e0623ce7ec017cecdb98bfe5cd20510419034d
font_01_sfnt_off00010491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10491 11436 bytes
SHA-256: f828a62b136668264de96beb5e498859a940a8c666e0ea6cd3de0b42bef6e5b6
font_02_sfnt_off00011f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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