Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb44868c3a49f55…

MALICIOUS

PDF

92.4 KB Created: 2021-10-11 02:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d80f9e87a48ec7de7f471bec8eb82351 SHA-1: 546f6628d64ef4c69029a4398dbb3045cc6e91e9 SHA-256: 5cb44868c3a49f555c935bfc4b7782e0429a45d6f7c033ce34585c87a7c41560
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to deliver phishing content or malware via these links.

Machine Learning

  • Nyx PDF Classifier clean score 0.1739

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.
  • 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://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/domotibaki.pdf In PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/komagafupizeminuratenu.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/83052809251.pdfIn PDF document text
    • https://iohrp.org/f_files/files/38099146320.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfefb65b54---22499954216.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b9f547e96---76629161630.pdfIn PDF document text
    • http://12shio5.com/contents/files/87398187520.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/26833079482.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/23658828031.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/70808937956.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/36168849105.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20211007005248.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/dalixud.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/32165377305.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/riwiruzixexepuneninaripi.pdfIn PDF document text
    • http://apcmagon.com/userfiles/39869224709.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161636277d6ca3---lepilemixi.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109061748155984.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/rividowivepivomax.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/wipunofojakoweb.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/1426928618.pdfIn PDF document text
    • http://espokebar.com/uploads/files/veziwizasuvikaxisevepela.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/24475893763.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/bawezudaritowuval.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/305639991.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/jugaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=why+is+history+important+to+studyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11536 10688 bytes
SHA-256: f021b75e270cf0f5a156a13fe61b2ede82e28f8d3104c7c934bad72c2a472f38
font_01_sfnt_off00012d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A8 18892 bytes
SHA-256: 92f626a03c2dc43459b9454fb66e8a02a90b23f593bd146e5cd30855a08fd65b

Open this report in the interactive analyzer, or submit your own file for analysis.