Malicious PDF — malware analysis report

Static analysis result for SHA-256 95eca8984f05cc57…

MALICIOUS

PDF

88.3 KB Created: 2021-08-18 05:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5fa1d25f4b76c54c4060ca996a130266 SHA-1: 5f747e0d2e3cb02a2db1810ab8f54cdcfb267419 SHA-256: 95eca8984f05cc57695a7233f0644fd1be2698cdfca13643e7f72aeee57ce74b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan distribution intent. No scripts were extracted, but the structure and URL findings point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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=humor+y+amor+de+aquiles+nazoa+pdf+gratis PDF link annotation
    • http://porpora.biz/imagenes/imagenes_contenidos///95813824450.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/samevaxigafaginudeg.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/13820221495.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/72260c626086ba7f2c8d85d0c79d2136/39910060412.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/75757119394.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/dironaxosukugekatevu.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/msmljtsltbh66l0p3fa6qsmn29/naxagufalamudokelole.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4n9qebc7j826mre6s5kt2s3auc/sibukupugosebawutu.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/qft5p7hmcttmnn0jk85236d2o3/vobajoluwonusomo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d65cd5bd3---lopuviba.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/mepuwimijepurabotusexupe.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/31209763133.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3bf38436b---wudatoj.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/luxuvezaw.pdfIn PDF document text
    • https://ebooksweb.net/files/file/nekorunerupivujamiw.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/44716991158.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/fif104a0ddh818qghv5bh1eseg/81701529238.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/9slvbl04menvirpeftjoak61lt/wivibuni.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/94555729666.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28265730853.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d323a7232d8ac0fdc59b2116cb2924bd/6158831977.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/6n4g92b9cc61dct53k5ie01tc6/41574398097.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/simat.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/povewanokerapozalijeb.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_off0000ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 11252 bytes
SHA-256: 2d735770eaf7477ac718ccf28c7a83e0d54628a97aa6dc030e02cc7fd67389d1
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F31 19608 bytes
SHA-256: f09007adf97517a60216a510e3e042c0c64a37c3161cc348347e5ceacc175ef9

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