Malicious PDF — malware analysis report

Static analysis result for SHA-256 979699961be09664…

MALICIOUS

PDF

79.7 KB Created: 2021-09-01 21:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d355f622a3ef9aabba5d8c7a24730a5d SHA-1: 80920617c823e388b0d065e1d6a384960e4d867b SHA-256: 979699961be09664b8a4d6809c9468ae016224fa74ac122f185e8d68ac66c0b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/uplcv?utm_term=cotr+theological+seminary PDF link annotation
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091451374c6d---64166489328.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f34b4996c---roromavonobigafuwogasepa.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4gscp33t4v7lbr3b14ruo0hejr/sanuzetuvataduko.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160855234f21b6---19876615353.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/551d20afff77dc8facc333aeba765903/ziseji.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ab58ec3e93ea01a2564fe348199d1ebf/kipodevab.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/29778216961.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/hn5r6eatis5mo8mcbrhi40jled/bixexus.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7pfvu8iq6v8a0nufuqlhk36111/gataseb.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb02884a32a---15713165544.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/wevitumeda.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/d4525de2381005e121b8c9ef48e2c13e/57133489446.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/miguvamijeru.pdfIn PDF document text
    • http://vodova51-53.cz/files/29624767587.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dceaf040f---dolufowiweditupaledatuv.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/60387393112.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e43439b61---vasufebezalotosa.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d11951349c---sematizugojubomupojog.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/60991556396.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/62433476011.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/sowitabizak.pdfIn PDF document text
    • https://digireg.li/upload/79462811166.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/gijogijareriboxexoxew.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF3 18448 bytes
SHA-256: 9720572b066fc13cd8f809d99f9fb5cfa26c67df28bde79c778f162f38f5b233
font_01_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 10820 bytes
SHA-256: 5027dd356034967ebc0377beb6c2afc4143feb7ddb43d6f0089b96f74f0f2d88
font_02_sfnt_off00011746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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