Malicious PDF — malware analysis report

Static analysis result for SHA-256 13384d78dbe9a6c6…

MALICIOUS

PDF

80.4 KB Created: 2021-07-22 02:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 738c5566618fb50ed85f1cff4e78e272 SHA-1: ce0c1d63115de7b47a68bc04d2de09f1af5c1fc0 SHA-256: 13384d78dbe9a6c660ed39c0467f25135dc91728bb346cd6f7ad7d764b97f5c6
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are designed to lure users into clicking on links that lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8512

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 http://www.radio-kum.si/data/files/28943694483.pdf In PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/vagetosabit.pdfIn PDF document text
    • https://tl-systems.hu/files/files/tojirazuwunozapojinuzit.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/88605326543.pdfIn PDF document text
    • https://pmms-online.com/assets/file/50969711845.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3c3fc7928---93742827222.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/f6dc0e187dca872ec20095b314224362/6230730390.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759c89b85c5---pikebikizolajimiwosawilek.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/79052648264.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097b32a809d7---lutavezaxigomajavev.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/9b33bf42e7efbc381d06052b32c72339/refozakuketoparefatu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d57344916---pesofuk.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/loo7m0kotg6soidfq5qooo21lf/27013588255.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/8767606439.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/64c5ca6866afa461c242e245475dd5e7/39569631429.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/gajolutewavalopodogewo.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/91675866489.pdfIn PDF document text
    • http://sapaethnic.com/webroot/img/files/88309424016.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/9e7e93u1g7s4psair2o2ncskeu/21185251660.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/70276169486.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab647b04b5b---bidelajirogegozufog.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/neloboreniresubeboki.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0c586d71d---zumozi.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/gepuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pyrogen+test+for+pharmaceutical+productsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 17104 bytes
SHA-256: 065de6b0710ac875d37dd9a1d9f69bb9c3bfb6dd7108ddacbf676e27ef97e103
font_01_sfnt_off000126ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1