Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76c32c26eb1cc0f…

MALICIOUS

PDF

73.1 KB Created: 2021-06-29 01:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 693deb168a4cb062dca09fe97d2c2d2f SHA-1: 2524f92af1288b5cdbb10ccc659cffd698cd19d8 SHA-256: d76c32c26eb1cc0f3c59424b91a8653d619787675d05d1ea932e41a8b7a7f300
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6lfk86vlkg3dq8c22mr376mklf/xewara.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085c2930d91e---bonenezitevumeb.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c532049e75a---63921502332.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/pokitavolefakel.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a244db70d37---jusapunopamofipaxafu.pdf
    • https://asthasupermarket.com/userfiles/file/56240372223.pdf
    • http://marinapogon.pl/upload/file/binisamuludok.pdf
    • http://diplomat2014.ru/ckfinder/userfiles/files/88734648018.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846c3a4d2b9---49186781236.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/h1l35sl43iibhfq3cq0bs35piu/vapejus.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1dfb65199b7e697d4ec0b49e91d0f688/5423826920.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd62392d9---49731266393.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/dezuvonutav.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079904d09a2b---86297640388.pdf
    • http://tuttotop.com/userfiles/files/gulukajiletatoxutobi.pdf
    • http://detikakdeti.ru/img/file/ragowoxuvujefirozobekeno.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/052f90b23e4c6910cbc3a255e13bfe59/50125166288.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/6q0t8s29i6rue8p4ok55gr46i0/godupizobogegojamitewar.pdf
    • http://moon-villa123.com/CKEdit/upload/files/37509568778.pdf
    • http://plafondchauffant.fr//img/user/file/goxojufirawoga.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4dde6335e---2448941918.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/cc594c54f6a0a92f7b6ad513b85281a6/ruban.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ns9isahcsfmk6hns42u3ob56jr/perevagipijulujezu.pdf
    • http://baigeleather.com/userfiles/file/woroketodedulibivunem.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/15f148d5feec4d68b14a00f545613028/49103485200.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=mile+22+review
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdcc.bin
a5d7d766ffe01565af4133fc2b2be9fa051e342d66e8611bb41659c00093dd41
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCC 16480 bytes
font_01_sfnt_off0000e874.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 16792 bytes
font_02_sfnt_off0001008a.bin
61d52adc66ef1df2bdb29ca340b53577f3707d38bbd409bce853cabd9beaa9f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 9716 bytes