Malicious PDF — malware analysis report

Static analysis result for SHA-256 780d01586c488fa8…

MALICIOUS

PDF

86.3 KB Created: 2021-07-28 10:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ea460b7084480bb40e6e223845768bc3 SHA-1: 433dce28f84764d6f13dcf2e96a2c37503edde8b SHA-256: 780d01586c488fa8cf47fa7e31c5252ef07881a7bf4b48f8efea06aa33bc18c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to deceive users into downloading malicious files or visiting phishing pages. The presence of numerous distinct hosts and links suggests a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082599d1f924---41935720688.pdf In PDF document text
    • http://childhood-matters.com/clients/49507/File/18500596528.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/gelepujimuri.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5aaf18e4b---kanaxav.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/25151050721.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/xusebuvefosaduk.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/vatijajutujubav.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/4omb8sibdeked6rffmkt3l8180/34529007598.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/turokakijovosegosakurara.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c1f4f2258---giretuxuvizezefo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8182f2c5e6---9365865988.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/btm7cojmif745ld2cntf6lvmg9/gedoniw.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/riletunibori.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/44934673217.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/20437799527.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec88717a3e---sorabobipuwisawuvoxiz.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f27a905c5---19409171995.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/12m501hjue7a7d7tncacttn8n0/20116003895.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b2c0535d2---zelirewimeposo.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/4531972693.pdfIn PDF document text
    • http://faxik.online/ckfinder/userfiles/files/miditiwidijim.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808f3a622eb---gixakekujadabevubejogukof.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/fojur.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/malesewanodiduwemijuma.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607d49147e119---xefomemane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=compr%C3%A9hension+lecture+ce1+en+lignePDF 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_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 10996 bytes
SHA-256: 1cd6ad86f45cab4a53181f8339f6d42688da5fd2ce7a877fc3f821ff2b75d533
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 18460 bytes
SHA-256: 94a8f77bdeb5bf08023a4e693123f5e3f9c0f1d424ec772ded0e0872b462efb9
font_02_sfnt_off000130f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1