Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5458121473eaf55…

MALICIOUS

PDF

80.0 KB Created: 2021-08-07 18:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 76737f067efc83e2fed6314b130b8110 SHA-1: f8c8e3237cb79dd69b44cd46a21b9672a8e1e8dc SHA-256: c5458121473eaf555fb4054378613d8a410d34da347c242e12cec8377392762f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9362

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://irlanc.ru/uplcv?utm_term=checklist+template+google+docs+free PDF link annotation
    • http://dieta-plus.pl/userfiles/file/durusupabujitusuvejabon.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/13068080034.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/kovugajikatu.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/norupu.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe3354ff75---66567647992.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105f549ab20e---39076122623.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/toladenumifa.pdfIn PDF document text
    • http://dlzj.net/upload/files/2021053008331894199.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4be32c32b---36062374003.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/65311887971.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/zojulewu.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/pidifevadepopibog.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/03df3932e46c32c510088c1003a8146f/60030814388.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/0fk1k78n794sbhgts8skbc6r8v/sufaxidixokezimedasu.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/zawoparaziw.pdfIn PDF document text
    • http://beta-rc.com/upload/files/28176284086.pdfIn PDF document text
    • http://axwelindia.com/uploads/mozati.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb2e530a3---93654271234.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddb001ea3d---kibibinajuzidolizukuvisu.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/80924151400.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/1792486253.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/d17261aa9f5b30347c14cbb2be5ba940/nipagivusutol.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/640c5371a98de5bbcc88f3f0c109b8ce/32362583550.pdfIn PDF document text
    • 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_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 11084 bytes
SHA-256: 226f74c29b856e16306bbedcf251777b8a7e52e9ba20202c041da9e78e55b4a6

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