Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4e8532e45a94c8…

MALICIOUS

PDF

77.7 KB Created: 2021-07-21 15:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b0b41fa006cb00147ffb90deb94ab916 SHA-1: 61211926ef5275b6477fc48f5473d047ce0bb984 SHA-256: bc4e8532e45a94c80bf2712e17790fc55647b60d389ef6274c277ca97c941c0f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. Heuristics identified it as a link farm hosted on a compromised WordPress upload directory, likely serving as a lure to redirect users to malicious sites. The document body was unreadable, but the presence of numerous external links and the compromised hosting suggest an attempt to distribute malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7562

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://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f682dc345d7---92704229488.pdf In PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/97381146097.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/11981404626.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c961a0f3988---rumababuribu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9571de6876---66224681673.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/90991915475.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/tolikiwevunijip.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/6fcb5f6ce2610fda2c3260223cf8ff29/xejasijenida.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/87126608282.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/fodiwibubelan.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/f21fab02bd3716c43a5d7b84402fd891/1299595280.pdfIn PDF document text
    • https://beaszemin.com/files/digadikemuduze.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071af36ae17d---sadevinilus.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/84594170015.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/50763246850.pdfIn PDF document text
    • https://dietacud.eu/upload/file/xogaz.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f0bb4cc48---sapalerilowuvi.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/xadisezudosedatu.pdfIn PDF document text
    • http://benetalent.com/upload/files/77005055446.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/18168762847.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f71f3ec533---jaxulilakelutigakorulime.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/96148458577.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/79448207915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=household+object+riddles+for+adultsPDF 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_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A2 10832 bytes
SHA-256: 29e4db89c1ff12cc95ea23ae862c03c735df48327697b5f35dddfbfd4432eb4d

Open this report in the interactive analyzer, or submit your own file for analysis.