Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c960f1c7036f30…

MALICIOUS

PDF

52.6 KB Created: 2021-09-01 01:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d652b3d05849f3d6b1e73ee3f355dc55 SHA-1: c746ac4c4cc53b3d8e47c5e1f778d8d4bf53f0f7 SHA-256: 47c960f1c7036f308907e22ce51989a20451598b681f7c2f658779f8af6cccec
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be SEO manipulation or redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8920

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://t-eamplus.de/web/editor/files/96775043139.pdf In PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0b2c528c514cfbb1d0d2cdd56aa5d839/10845657303.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/05c01i0nq0758mq2c90mb77ctr/dejajizuparub.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/17032632819.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d76qohfd9mqn655enje5ag28n/temewagebitofi.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/71pheun7nf1j1o5rd98i6msgv1/98712827859.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/mukabugerifabeba.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b99b8f3551---jujuz.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/69029155190.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/85100315714.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e4a3c13d8---genajunosetugoliso.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/7521858744.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/jibatexibe.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/zazegizaburazew.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/najisexar.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca47c91b5b---32069246555.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/rateku.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/f074dd502e083b646563cedd95f88277/70086607929.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/78234606566.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/vifozaromaxevoporofeloti.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/tinab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cats+kittens+for+adoption+near+mePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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