Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe2b6173d924f74…

MALICIOUS

PDF

88.8 KB Created: 2021-07-09 01:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8183350cbdb529c240b0613ecb76aec6 SHA-1: e6f99edea44ee1b0a3a11e2ebb50db3751524be3 SHA-256: dfe2b6173d924f749a2f49e9cd9e4aa2b61b86d7594028d90a0e4c89459d16ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebecaa776d---46794821393.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/cfbccfe0445d114c7293dd52b08c7805/90124980929.pdf
    • https://unicon-msk.ru/data/files/6691477220.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/474f5e4d713ef4aed4f10fe5478e2a78/sakis.pdf
    • http://sutphinsgermanshepherds.com/clients/21958/File/xovujopavumodixowunid.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/zemopupavobitulageva.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6164c139e---gedogo.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/769fec416aa95fcf6188dbe91bc83b42/zakebajoderujufe.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa8659f9a0---91585049986.pdf
    • http://novichiha.ru/pic/file/nojudaruvava.pdf
    • http://duda-tech.pl/dudatech/upload/file/sopudelogalarej.pdf
    • http://growlink.biz/userfiles/file/2269571192.pdf
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75812838389.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160928ebc6874d---gabunulegi.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160881b8232882---faraviropivozezezo.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acab534d4d---mesirov.pdf
    • http://kpotplace.com/uploads/files/50255348940.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cf3e71f3d---8722415832.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee31b215cc---gawogumed.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0ec63508ad5a62c77520b0827f747520/64989040695.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078323e3d478---waveveragugubuzokuzaxo.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0212dc989---12443042724.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c064c953f91---mizubur.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80d6b10465---damak.pdf
    • https://nabsangram.com/userfiles/file/64750242185.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+reguard
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94f.bin
a77c1d831deeeee488bd154b08e26f25954ed6ed4d87956bc169a846e3e06645
pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 2016 bytes
font_01_sfnt_off0000f292.bin
f969f8777a4fb03f9c946aa518663f0b263d51ac7766311bde8654df6dcb5082
pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 19684 bytes
font_02_sfnt_off000124ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 16792 bytes
font_03_sfnt_off00013d03.bin
47b7b25f2f775d213553908f9ab8de7cc5aecc4a2bd7db1736b43990380653bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D03 10308 bytes