Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf3fbead92185fc…

MALICIOUS

PDF

127.7 KB Created: 2021-08-03 10:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0b7b495835239cbe4638c68566f53b5b SHA-1: 8e74f606623eb1761de81a385332f4d4d28ea643 SHA-256: fdf3fbead92185fc9236f8544b0dc5568cd06c391e3d4b3d6abfc60eba1ceafe
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and link farms suggests an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://pixomot.ru/uplcv?utm_term=how+to+cheat+in+nba+2k20+my+career PDF link annotation
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087552790878---37702023125.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210723_D32ACCE265E1D214.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/tilolokopufebudugakeniwas.pdfIn PDF document text
    • https://lemanssrl.it/file/lunel.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161069ad6efb51---jipofupubogoxuwe.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/benobunora.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021071705594956.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/55925445280.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/kotetugeres.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/25072056323.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/14315848487.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/fulorikiwejujob.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/1960rvktjet4pjfcc0vilm22na/84373448052.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/62691523319.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6e2dc650a---tixin.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b5683962b4f---9793296581.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/91357575655.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/e9g8df0m8v4r7o2amhth7ffeh3/20683203876.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/kotofexa.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/604d42f80da0003cd6a5b2687d778e1e/99495540470.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608575b799265---nisazerul.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc6804f477---nivekovogitixuzumefulu.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_off000191ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191AB 10944 bytes
SHA-256: e9fd4f1ebb14d5211abf0eb980f462a140c6bb0c5c47d8311d7797c26f001ab4
font_01_sfnt_off0001aae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAE3 17052 bytes
SHA-256: 2d149f5749e21bf6b0452478a79cc3f8769f6a32804aa69b8695a17c3171951d
font_02_sfnt_off0001d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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