Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ef5cd1231ae0aa…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 01:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 850e1a4c3c264e28d4e8a7c232762830 SHA-1: 21bfa26aa979cd87d6a232ec38ea9c3153eb4630 SHA-256: e0ef5cd1231ae0aa56156fe7ba37c48c2ede8cd55713201cc69c5ed0f10eb62b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to various domains, including compromised CMS uploads and disposable hosting, likely intended to redirect users to phishing sites. The presence of external URIs and link farms strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=geronimo+stilton+curse+of+the+cheese+pyramid+pdf PDF link annotation
    • https://mi-stores.com/basketballtotaal/images/editor/file/99239951031.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/97949d36b8b758b65839eecfc102b5cf/xotanixogejaxarojoxoxe.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/60880068927.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161391a81b75bc---wadafi.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/81725006722.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/nogarowadapifezanebalapep.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/83606635074.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/72984842482.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/86700705465.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/jasowozexemujeme.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c36551a7f4---nuwevawo.pdfIn PDF document text
    • http://ilkemymm.com/image/files/taruwozasifajel.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/tolomikekaripejed.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/54840459864.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/95536796583.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fc6619f0c---duximawimogukoguxox.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/11932769139.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/48628703931.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/dewem.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a27e73d29---38100435276.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f6786ab33f30c9f74973825283a1d707/63570743203.pdfIn PDF document text
    • http://debten.net/UserFiles/File/37313162108.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/3560465665.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 11140 bytes
SHA-256: dad2e9e46a45c2d704d98c59c37c8e14f44547941645012cd0867feaa19712e7
font_02_sfnt_off00010426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 17624 bytes
SHA-256: 7bab6a0a372bd7dd2dcf41d96606ad22c0ea998f1ee8ec5293b4078f3119d2fc

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