Malicious PDF — malware analysis report

Static analysis result for SHA-256 8991319e672535cf…

MALICIOUS

PDF

73.4 KB Created: 2021-09-08 02:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8e69be215e08a42a5b82f1c484fd3d06 SHA-1: 34eff82bbb2307c90771ae29a3f1164a986d3392 SHA-256: 8991319e672535cf9cf5482ab8abcb98a4c7fa200db5924ec989b7319045c929
154 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to disposable hosting and compromised CMS uploads. The presence of these links suggests an attempt to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://novussiteyonetimi.com/uploads/file/28211992805.pdf In PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16102bac378c56---sakukubagi.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/79983072589.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/6263d80287333188b1a0d18eabaeb65a/lanesanuriz.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086456b4a85b---vezonujijonuxoz.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/94337366703.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///88923594073.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/mifazidudugexekosexakixun.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/m9mvlq6he5ai9df4c7g96vgbi5/43304439861.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/53481410076.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab750524487---79848811063.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///mokomupisufelofinup.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c244787db---80000233325.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaa06565d8---69260115472.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210803020855.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/siuspruqfnadgchi3e3sg5ecdh/xuxowe.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16137cb1ce60da---fusow.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/xoriradonewedodojiz.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/59400341750.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/hr2f8d8hm3jst2rk1v4duo3m10/vomokubojiborosibafi.pdfIn PDF document text
    • http://armanetti.com/images/22112830747.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/vuradudodoxewewemubonawo.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afdf4e6e7f---81655588918.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/47db819a3d80a50ff80bfd2dcb0ce160/puxeturumixebekij.pdfIn PDF document text
    • http://keitbg.com/images/files/62489520988.pdfIn PDF document text
    • http://envigest.cz/upload/file/naluzivomafirogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=toyota+rav4+2009+manualPDF 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_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 18448 bytes
SHA-256: 29543eba69cc08a7abf1f24952e960b3ad01bf42d933932b634d99078b5267b9