Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed9c5222d51add3…

MALICIOUS

PDF

102.7 KB Created: 2021-09-04 09:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 536d39b8adc16c2d9455ce0858cd8133 SHA-1: 35374e33300b946ff47e85c64af82bff0eb6a130 SHA-256: 0ed9c5222d51add36fb82aa6f00cab9d54419585d6f1c8f2a0d162621a71089d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI links indicates an attempt to direct users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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
  • 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://krisoc.ru/uplcv?utm_term=breast+pump+manual+yang+paling+bagus PDF link annotation
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2b39e473---28551574835.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/25994699587.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16086e0bb02f30---96448326272.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/retizepasepomafajulibo.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f6a22a84c8541027239dac8dfabc80c1/98939532281.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/veremiruzekojir.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/72528194205.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/60557745250.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108340fb981f---65779415558.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aeeada44b58---60790065673.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160997d8d5865d---83462609116.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5d01abf7f5b0ede19101a36e2909b5cd/44940528894.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/67302542076.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c1698014b22---nigigosoj.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/54869511348.pdfIn PDF document text
    • http://seritour.com/rsm/files/vaxokarelojigoza.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b3a119dea---80159509914.pdfIn PDF document text
    • https://rosycaffe.com/file/58262490654.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b9ac6ae1fe44a9dd1f0f97191f318ed9/8027931147.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609736eb71249---ganofojovanadev.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/51481125714.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/walutubetibefuvipide.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/podojononupunuvodusi.pdfIn PDF document text
    • https://marigabung.com/contents//files/kamumutogukeretabof.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/28672022444.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_off00012cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC1 10880 bytes
SHA-256: 3f25e5ecb90d2c2e3f32ece0d1759fe4431bca67037fa7b28fc64bf78aba6459
font_01_sfnt_off000145b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B9 18104 bytes
SHA-256: 3c13d8a4522c02b38b8a7862f74b264cd565e090933007d4f49c660188347cf9
font_02_sfnt_off000174e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1