Malicious PDF — malware analysis report

Static analysis result for SHA-256 7091abe41da9df49…

MALICIOUS

PDF

81.8 KB Created: 2021-08-06 00:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 86b5b5bb13be712e5559dcfc59eb35c5 SHA-1: fbc60f743c4044c44ea7ac3045f42b8ff7b4eab4 SHA-256: 7091abe41da9df49bdddfd83cf1890bf8eb76e66797846c608dece4ac945cb2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous URLs pointing to potentially compromised websites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine rankings or lure users with specific search queries. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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://airconbank.com/upload/fckeditor/file/rixukatezujig.pdf In PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d6cc3a2ab---rinutejo.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/pth04fdjt731j7nuejm5ds3g1m/wodajovazevexobogalirog.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/71052736796.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/5001339487.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a4b0eb26b18376719b9372d22f3953f9/pupubit.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/c1iecaoluldjdlevfd4rdgvjc5/31269550914.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608002209ed8a---4450092370.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/457ab0c37f0787082c30121c2f39642c/luzokuzujigigifopim.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s4640e34nhh75mvsmdnqg4efao/7241532584.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/kininajewita.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3d82de9b3---buxorowanupironekug.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3b06196db---19599642178.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/jopeloliwusujimilute.pdfIn PDF document text
    • http://goldmustang.com/files/files/zupalixisow.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/83053342333.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc47f677afa---57200050842.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b131f86e474---boximikupavexororo.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/69577746224.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/6923310b8a6a4c62fc76e71c4a4ddf37/86116001839.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210626143629.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/55f9235b294c2ad94081efd82540b5fc/25611885724.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/zapepifesizufi.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/47108087037.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=hypothesis+testing+exam+questions+and+answers+pdfPDF link annotation

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