Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8bbcb6ead00e6b…

MALICIOUS

PDF

69.3 KB Created: 2021-08-31 13:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6ae4923dce2f0304d60e9360b4fe492 SHA-1: 495e95bf6ab1b4c62b7245e7a9a6e54a090864d0 SHA-256: 0c8bbcb6ead00e6bd9c70752745a80cfce308a8c8f450a2d632abc16534948c3
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier also indicated a high probability of maliciousness. These factors suggest the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6473

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://icltindia.in/userfiles/file/zemotesiviwe.pdf In PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161165bdee48d0---16312134720.pdfIn PDF document text
    • http://mamitobe.ru/files/file/tifolakinurulodala.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/18367783726.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcbc9b65bea---12820952686.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94e124580f---volijomaj.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/xidikegowakawefegepiv.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/clmgdmvpc4h8ph776irh4i0dt1/vanivikebokona.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1610656d618122---mewezesisilinaporaxajetu.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/kiwikiredikas.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/55891356196.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/4458163401.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/38406488578.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/aec3377fc6a6d9e966e4133c1ec3def9/madomoxedibopezodini.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/50201648396.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/80710521489.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b226f927bf5---loraf.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/7627205558.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d956fc23dd2---9431255497.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/b2f64708897abcb2cf9806b5a18e6910/jufewobizebomogaj.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/27374422722.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/65308694879.pdfIn PDF document text
    • http://dakmet.pl/upload/3933565108.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a24d8c099---sazilipejujebexevutano.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/5737088330.pdfIn PDF document text
    • http://teplospectr.ru/images/files/lukowewinirilifejija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sandstone+is+a+rockPDF 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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 10484 bytes
SHA-256: 22a45bb0ed46d17fb446ef09d26fab3df25f928a4fdeb20490915858dc2e812e