Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad0df5e0acccc19…

MALICIOUS

PDF

74.9 KB Created: 2021-09-18 16:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 027d811479b8597cad7b97070e360049 SHA-1: 48b5d07ac303866a91b9cb78db5815c5f77da691 SHA-256: 7ad0df5e0acccc192be832d235a5f881e6b7a70d9dc4b1d9c58428bb993be287
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as a phishing trojan by ClamAV. It functions as a link farm, hosting numerous URLs that point to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to external, potentially malicious content, aligning with phishing and credential harvesting tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3852

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://captaincook.hu/userfiles/file/79065381109.pdf
    • https://apgr.eu/UserFiles/file/gisizapuwipezux.pdf
    • http://redeyeldn.com/userfiles/file/84783708130.pdf
    • http://thaihotelsale.com/FileData/ckfinder/files/20210918_CE77A70C2EC8B945.pdf
    • http://cableesmaltado.com/d/files/gukir.pdf
    • http://0851gay.org/userfiles/202109file/2021091417363370554.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161421771700cb---91713021064.pdf
    • http://woori-tour.kr/FileData/ckfinder/files/20210914_0937DBB9CF2B9190.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/66574024911.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/99561653743.pdf
    • http://naturalwonders.com/uploads/files/87969714604.pdf
    • http://dellalontra.it/userfiles/files/xabokotiralulogijotaj.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/vojir.pdf
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/zuvuwarabesuni.pdf
    • https://jagamimpi.info/contents/files/2576718944.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1489d53ab---jozatefiruwewo.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a93caa39e---dalajoxegizudokasefevov.pdf
    • http://thevisionkharj.com/userfiles/files/wezegumukiluri.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e692c3ab57246a2167e9cf68f1cb6011/84569178855.pdf
    • https://nilsahost.com/calisma2/files/uploads/59084821276.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/48110957121.pdf
    • http://wangyiphk.com/userfiles/vekexuluwedo.pdf
    • https://oferta.lt/i/File/31679923260.pdf
    • http://lavalnerina.it/userfiles/file/fopewibaboxafivejoxezu.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c971ed1926---31747154091.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=good+app+lock+for+android
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0c.bin
51c6a78e2eac793300e478b024a59b65e90b4486e0754815de3bafe4d08f81c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0C 17084 bytes
font_01_sfnt_off00010725.bin
86206cb8949cceaf20cc7df39659a9b511d656ec477ff8d530e976110ec43234
pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 10348 bytes