Malicious PDF — malware analysis report

Static analysis result for SHA-256 d744922233f9bffd…

MALICIOUS

PDF

63.7 KB Created: 2021-09-29 01:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 30334217c73142c5b9e21ff5573d0e7d SHA-1: 6a46d4bdb6551d4b9934a785ab5d1caa088cc2a6 SHA-256: d744922233f9bffd4956249b6547bcdb384e69cd7957d75b942aff032a710d22
154 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple external URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to further malicious content. The primary function appears to be redirecting users through a series of potentially compromised or malicious web servers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

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://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd21d5ceff---37924914254.pdf In PDF document text
    • https://lean-ds.com/upload/editor/file/foxapomedupud.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/ecaae8a03a96ee6a4a6ae783dc973334/viduk.pdfIn PDF document text
    • https://kede.org/userfiles/file/wugapelosugali.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/tabuwuwizewaruxefunirafor.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/85910557383.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/bewudozazojapedi.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/wisovowef.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbde014bb8---bomugosulumazuwakimolut.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/de36a0c3bea222ae8737c313f61d0c01/pifemejuzokapu.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/junumedodixafapaxekoj.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/kojotasijalofiziluzujo.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/nerolajaropagu.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/xufezopa.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613bad9070733---feroxujibet.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16150d00c2bbb6---61209392570.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109120053012489.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210907_051324.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/tanavesufalejizonekarese.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/4510173711.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/lipobisafuvogejuku.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151ef1909dfe---jogakisurutizalosal.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/zatigesamukilom.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/zilotuzividi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=osi+model+layers+devicesPDF 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_off0000b0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B8 14648 bytes
SHA-256: 701f001fb74f08033b998d992375c5573180bd6665fced0e3708665d8766d85f