Malicious PDF — malware analysis report

Static analysis result for SHA-256 0567b106cd340a97…

MALICIOUS

PDF

79.0 KB Created: 2021-09-11 17:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 061fafd5bda5c120124aa59e4c514a17 SHA-1: 9567ea2056a8b4d9e55f729f22233ea970c4b501 SHA-256: 0567b106cd340a972e4c893eb85b342df36cced714e88ccabe7d8b33e89232cb
132 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer, likely to facilitate further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=high+graphics+games+android PDF link annotation
    • https://aymexco.ro/ckfinder/userfiles/files/wupiro.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/8360048329.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/banejemu.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/80357161988.pdfIn PDF document text
    • http://krishikhabar.net/assets/ckfinder/core/connector/php/uploads/files/76424490388.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/8867403738.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mudogok.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/sezevifomokafuda.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/1209295718.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/bebudivefadavibikuzew.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109070654141851.pdfIn PDF document text
    • http://merwepizza.com/upload/file/ziposowawenofedajenavomu.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a1cdc2117ee74ba5f54d105293ef938c/88008798762.pdfIn PDF document text
    • https://wittnebel.dk/file/mozemeposelujobexovoter.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/xufilojifowuvajupidadez.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/77691955370.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/palovi.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/kumabuzota.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/58781795616.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cff083db70f4d049e299d3e30af7c4df/56532813280.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134032545890---73478396361.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/lavodinini.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/25146825354.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/gipit.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16130364124d45---tadoxejixudolezikudato.pdfIn PDF document text
    • 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_off0000ec9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9E 10808 bytes
SHA-256: 307a0670548dac3e6824a89941d99f1f22565f5cfd107b9658b4e5a4f8ac237d
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 16664 bytes
SHA-256: a33b727820f1e64eb229abcd948af354ddf3e4dfcdd5bdcebdb7cb3fa3a2fdcd