Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce232941cbb69794…

MALICIOUS

PDF

65.1 KB Created: 2021-09-20 02:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 077d8ff093d5cb283ff888641b7bbfac SHA-1: f7c0e32e12ea559dc348c959865a3154778a94d7 SHA-256: ce232941cbb69794685cfa9f8d31746ff293b08b98057597cba89bc1ba471c68
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be part of a link farm designed to redirect users. Several URLs are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute malicious content or phish for information. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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 https://ketchas.ru/uplcv?utm_term=irc+android+xdcc PDF link annotation
    • http://theclubburger.com/uploads/files/98480618313.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/lunowixelugov.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/53408979166.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/jekuzavewenefolalopavox.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/wixekuriruvekuzajari.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/80480668037.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/fafatato.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c761781e9a2588dca07f179547f8967a/getinofogitazenuxoxizix.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/85098873660.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f20cd22c5ca8b01de1986e04e91bab06/27070370220.pdfIn PDF document text
    • https://timavoshipsupply.it/userfiles/file/64535241633.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/bajuvaxizoxozerokupufuga.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/48563275892.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/wisudasolibit.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161319522449f9---tisadituxupuxupuzo.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e7f0e8aab916f750defabc7ff5a7c755/vegidapojowafutumodod.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/mogisuduwisonara.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/20424133622.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/55884293948.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/89715799809.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/8824035463.pdfIn PDF document text
    • http://ebus.cn/up_file/file/kosapifebu.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/63c72ce3e52644fb6a3fabdf9fc7dc87/merapo.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/92125639041.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_off0000b3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EF 16432 bytes
SHA-256: 550cf93588e61a84ccb3f48eb1e03c18eea7eeca7417cbf04be32c59467ac2cf
font_01_sfnt_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 9972 bytes
SHA-256: 21449dbe582c4bc005e6cadbeb23a97d6235de4145bea8090a3ea1dd7eaed207