Malicious PDF — malware analysis report

Static analysis result for SHA-256 6208b7d2e6dbc303…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 04:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 17dd297712cf9e867c55f24546e4301f SHA-1: 868a94aa7167e0617cb94706f82d85580f7ec247 SHA-256: 6208b7d2e6dbc30340d60b287c3dfdaab2df4a89f26600ad23d7d5780c88029d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, many of which point to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the links as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

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://scavilecis.it/userfiles/file/fuxozedig.pdf In PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/dojasi.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/vebipekuvumegetedixavifiv.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161042c241590e---xupobineputodit.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/90581385335.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/27542912624.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jmc0vrlkik3vis3nti2vikf4s7/sufomawejojesivaxubez.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/35333186581.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094121081e42---xajifoj.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e0a29bf0c---48080367320.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a15e213c2b3---pelezakiw.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c85a3daa45a---belofaduxaw.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e5b2a089edc5750dd410f01e99953ab3/tetasunuzonuxuwut.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/wujowuvesefuxufunefu.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/cslpi8s15p1sji0v1bc1h332p6/motuzofadasipipa.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/440573e8c4f980c277470f08d1490e6b/51066296428.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/zusoraj.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/fd1d273f2facff01dc93215d49291fa7/64109531955.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/71784700020.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/180103104753.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/f749a893e3ac52fb2320d8380e2a6b7d/83650438954.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0cf93ba8c2---61142991806.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd42aef2c09---4699147207.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9068e1702---89518444318.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ir55r86uei4m45ng7uh349398v/76982222614.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2bc52780---vemesikilujarijususazakoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=biochemistry+metabolic+pathways+pdfPDF 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_off0000c4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BA 11176 bytes
SHA-256: ea3106eacc8eaa2f52a4f59c30af2b39bf16cc1f605f8625841bee9c50bea231