Malicious PDF — malware analysis report

Static analysis result for SHA-256 742d3e82cc75164d…

MALICIOUS

PDF

78.7 KB Created: 2021-09-19 13:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2fbc292d59b485de9711ffe7806c54f SHA-1: e74fc5d69348da39bce68250bf8cf5966928e689 SHA-256: 742d3e82cc75164da5febfb9fb16892ad61e622cd42435c8158db048c86328f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting sites, suggesting a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the presence of a link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://crewmak.ru/uplcv?utm_term=brian+thompson+shao+kahn PDF link annotation
    • http://boxerdapolenta.com/cmsimple/images/file/91897891373.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/lizidusugoweponerik.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/zunareridevoxegotoxogowaj.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/rikuziv.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/nojulefevo.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bbfb17102---47311450513.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/forogorekodonefusaresoxa.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/zuzapuzazamatu.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/77101936430.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/37766633760.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/81501460268.pdfIn PDF document text
    • https://coevent.ru/upload/files/fiwavofazude.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/68326258996.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/gorukeko.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/befonafe.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/maxazorowitovofubojiz.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210901105814.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/rovilowiwodujupulame.pdfIn PDF document text
    • http://etnorom.hu/pictures/94551947593.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143694029c83---87600277474.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613eed4bd7dfd---jowibex.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/ketalagokipazulogebizir.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/gituduvupoto.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/tapigivonuvewudugali.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/56806437831.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/78384956066.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_off0000cdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFD 10484 bytes
SHA-256: 1d105fb19ffa866e493f003ead4e801c4fa97273ceae9d4ca6a17f06d105ed0d
font_01_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 18276 bytes
SHA-256: f2a40b8ea37044433a32f7a21494d76f1d8006cad2cd3a5289220bfbfcabf137
font_02_sfnt_off00011571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.