Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a97b9292e0ae6c…

MALICIOUS

PDF

77.6 KB Created: 2021-08-21 13:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5eb6f2731e962eaed41bcf633e2b290b SHA-1: 6aa6a9f94cd457e7da8b1a6a2b2f9b7f5cc4bdfb SHA-256: 96a97b9292e0ae6cacd73221121252f1aa91a99bfb8f54bdf31648bdb2c3de89
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/gorubobuwexomaxupubijixuv.pdf In PDF document text
    • http://absolutelyneon.com/userfiles/file/16438294761.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210514151234178.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/duxumenumev.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/232fce3daa7cf3467345ec79c1083205/62372777423.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/garazafomax.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1f32ad3e2749c1545e57c9c00a85e605/buximojujexinarazesug.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/12e5d4ae2bb3aff80c74e3aba7b1a611/39854381622.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818d65772b3---nexil.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/55264552836.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9b108f41cbd9e7c38d21df6659704e2a/19779764992.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/nc651n9tkjfsdpqlks2icci8ga/mededo.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210628052406.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/44924260239.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/69857716186.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/49189841786.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/temikegiwokipog.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1257483da---47607353174.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/54758895267.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/m95pts9knp1v84m5an0af2jccn/rirudimakodoniso.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0d234227d1850cb18a3257718e190e4f/81059021638.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/r6lcjvofb6bc947omoqnpsori1/84137812785.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/pamupovojidazitagugave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=avm+rajeswari+school+admission+formPDF link annotation
    • 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_off0000c9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 10904 bytes
SHA-256: 210851f802c0162c7d681aae394c041cd82e01128f8e606505059440c3ebfc69
font_01_sfnt_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 17032 bytes
SHA-256: dc17881a7d5aa12f54e94f0d188f3bebeb4c4e331b038a4f03169d5fd0eab55b
font_02_sfnt_off00010f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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