Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e6465602d528d9…

MALICIOUS

PDF

60.9 KB Created: 2021-09-19 23:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a1fa7af95ed1dc547b447cf9128b1cdf SHA-1: a1e479ed670c9bd82358dd5baecc7f0dc2774f40 SHA-256: 28e6465602d528d97ee7b089e9a7cd6bcafca349014cbae24b07f7c70e7f7df4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier flagging further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5765

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=big+data+analytics+pdf+for+beginners PDF link annotation
    • http://cnc-soustruzeni.cz/files/file/jirivagiwinetotewalegasa.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/punazofemake.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161435d8f02a4f---92864404262.pdfIn PDF document text
    • https://sainaudit.mn/File/podisamanirubifosusivef.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/remaduvejatu.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/54921023930.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/lilukajazutavefojakanagix.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/35515463893.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaac412ee4---vedisasijuwo.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/35870695523.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/dac479684d7f45903f0b75981bb7eab2/deliwajivixesiwutizi.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/mazebu.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a245ef664---56317319338.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16309655344308.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614036bc93be2---tezazeto.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136a9c5a92c3---biguviwawojo.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/roxuxowazubonenu.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/jadisukazuxuj.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/93338947107.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/gesifib.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/77806396585.pdfIn PDF document text
    • http://autovoda.ru/upload/files/wefutajugakeniki.pdfIn PDF document text
    • https://hinaweb.com/upload/file/kaduvedutibataniguj.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/pinevadolitiwu.pdfIn PDF document text
    • http://intertravel.hu/_user/file/10424305288.pdfIn PDF document text
    • https://agrando.cz/files/file/japafafuje.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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