Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca890ec5416664d…

MALICIOUS

PDF

91.3 KB Created: 2021-06-26 03:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6239ed42139051cd785545e0af30a5d6 SHA-1: 9394051f2357b959691c186260c231de00c008fa SHA-256: 5ca890ec5416664df651b05500e0cc8c3b8bf1e99f8ef5985d986d5b029da80e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5aaac364da---wabusibag.pdf In PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608115546181c---lupif.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6c3eaa544---80022546940.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/foragupajop.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a9826a92f---ramopobatedovanunikek.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/rifomotonabugadagovari.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/oq2c7fi0ul6n3g8l85sjljk224/21203899665.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16085ba386ea7d---vemovirubugi.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/nagemajumafuli.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/80975334041.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/24869504484.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/1236008193.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b12556ec4ef---muxaxo.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/jegerewujafozinofun.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/42054973186.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/12066617768.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5c101b6b---16611076826.pdfIn PDF document text
    • https://mmszke.hu/files/file/pagejubigudeleboboxisodon.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089fe005f115---18219925878.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/57356568990.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c687ea7288---figilitukidukisugavig.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/begasezokofip.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c398bf27d---52282472888.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/92877988348.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608501d69973f---67842797798.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607046b595049---69047095435.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/juleretefojibegeterixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=cute+fat+baby+picturesPDF 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_off00010285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9C 10588 bytes
SHA-256: bbc6e454c9c08bd798ebb9c1d7d98a1fa18aa8cecd7db4bbfc6f6e6015370b05
font_02_sfnt_off000132cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CF 17328 bytes
SHA-256: 01a0849979490320bdf2abf2fcc22ff96238e2e718a471935329dbdbfcb575af

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