Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db8ed8692d7b6f1…

MALICIOUS

PDF

62.3 KB Created: 2021-10-02 13:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0766572173696a2a73acbc75e8411a25 SHA-1: 218bd5a8ee0d3ff070328fcb150748c70f2e0cdb SHA-256: 8db8ed8692d7b6f10141fd1c8d723b4692db5042bdac964a20c4fc939a5c1e64
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95' strongly suggests a phishing or trojanized PDF. The presence of embedded URLs and the nature of the heuristic firings indicate that this file is designed to lure users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=counselling+with+reality+therapy PDF link annotation
    • http://www.sas.edu.mn/ckfinder/userfiles/files/dirimubebumil.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/susowegutifivoxifomewoxe.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/15364525274.pdfIn PDF document text
    • http://elitvorota.ru/f/file/sebes.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/83477974304.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/rulokuwif.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/68044912676.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/81118114353.pdfIn PDF document text
    • https://metagrhyd.com/infopub/pub/file/88551539904.pdfIn PDF document text
    • http://keitbg.com/images/files/25836248728.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/91898578369.pdfIn PDF document text
    • https://ziyang100.com/userfiles/file/art_16331556294846.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/razadajulibojutekofufa.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/40928717086.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/54052236365.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/87002900807.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/73160751825.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/98597991053.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/tifijibinalipanitaruze.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109080610386456.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/xijozeduzi.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/sojeda.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/70f21f2fbe18023664fdc613905179bf/62815655992.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/xurufivikuzabodebikizevo.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/lepiwapu.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/78089301289.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/sugaw.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_off0000b5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BC 16288 bytes
SHA-256: a3abddb0814eedb7338426893e53963a7f486103da64461b90135adca363ae39
font_01_sfnt_off0000deb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1