Malicious PDF — malware analysis report

Static analysis result for SHA-256 626f0b5fd5572075…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 07:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 001afa04b98cc12819b808a4c96551e7 SHA-1: 659cf070293d597182cf38095d94738684750a0c SHA-256: 626f0b5fd5572075244121ae831ea943513d4a1f211c18011394fd6a742b12bd
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6130

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://hnc2.com/userfiles/file/9118687995.pdf In PDF document text
    • http://www.moyekolodin.com/files/86554778599.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/zipifa.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/7om8n2fliidqmfqags0dufkh3k/45772986566.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/a0ivsbh25ojui4a7ut49fbth27/tisusenunagekejavedinoput.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/eef6b1b7eea824dfeaaaf7736c023c5e/kadeko.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/36365767629.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44832049349.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/20954070976.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/polaja.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/bozefugotofobixopob.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/81705322143.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/3321822997.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/wagatewuzozu.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/sabaj.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/finagenapogitosofono.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981151e9bc9---toxibosopukezukobojigutu.pdfIn PDF document text
    • https://ka-base.no/images_content/file/setujidenat.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/j671a0dldgb0v1fbnt7941v42c/59737520581.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/zokinemur.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba665981ff---19128512057.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/86c190ed29b496790b34d0bafd6f0a52/tivoxogufisivaxuxa.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ea12a8043---kalepivevegupogagav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=free+pop+culture+trivia+questions+and+answersPDF 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_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 10880 bytes
SHA-256: edc7a1345da697af5070dcf4b2b9ac778c78f4e55a6e9d07d0503338051759f4
font_01_sfnt_off00011222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11222 18560 bytes
SHA-256: 97d0ae6930bf6a33f5f94ff4e06c862fba956b15e2090394dc00829bf6973d56

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