Malicious PDF — malware analysis report

Static analysis result for SHA-256 54abda19a31499c6…

MALICIOUS

PDF

84.2 KB Created: 2021-08-10 08:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8083d823d0a4cb043ba0dafdd36064a6 SHA-1: fce9186951686e2a9405fc5f221d665d7ce6fb9a SHA-256: 54abda19a31499c6a9caefb086bb404268d444eb1aba0c200877f68af1007a14
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://medvor.ru/uplcv?utm_term=127+paseo+de+gracia+redondo+beach+ca+90277 PDF link annotation
    • http://abc-tel.ru/data/File/sanazetekizimi.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ce2dca5b8---pezogo.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/zunesabuzuwufobedared.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/diwexebokasovunagozegixu.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/e94672dedcf5c7fa9d5e65d4d4a0d7e2/vibobofek.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/lepewipotemuluv.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/91753552373.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/daxonuwe.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1efklcpo9b9qf9rgsc192d9d14/sabud.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/1f5476a4e7614e565b3219a7ee8ac76a/tenafapigudaremijomisaz.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/mefow.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/zegirepuwekodobex.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/87589517584.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/fibodetusunosiwokunilowej.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/89183908413.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b82cb534---fagebusoviponekosej.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/lemetimetuxibob.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/gunixepurezawoxisujode.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/98065576933.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b70705d4d6---fugarenanobekenapadegeb.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/bimalimuxumoragopigage.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/503g01mh6uk7j08igotm5a2vt0/57617851135.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/64500a4365823d05525959a10ebf14cf/faboxaloxorodajepuva.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/32064540695.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_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 11204 bytes
SHA-256: 395d776161758687f39e20cb70e19a66bb151b63a5cc212e30bfc17aea421f43
font_01_sfnt_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 17316 bytes
SHA-256: 21d200bcd833daf624d53165f1a8fb5216689e903db27880ec91279fa1369b60
font_02_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1