Malicious PDF — malware analysis report

Static analysis result for SHA-256 e043b4085f53453f…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 18:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3fe7f74d1b16ff823c116449e9f63f19 SHA-1: 27894365194c66502883232d6610041710c82414 SHA-256: e043b4085f53453fa69fbb4b84e88889708202221a437ee17143884c3d85d347
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and its classification as a link farm indicate a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://ketchas.ru/uplcv?utm_term=apk+apps+to+watch+movies PDF link annotation
    • https://landtop.com/filespath/files/20210919151218.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210914_42C4C49F66ED00EA.pdfIn PDF document text
    • http://soles2walk.com/data/file/75171634741.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/jutawimerugaja.pdfIn PDF document text
    • http://ranczowdolinie.com/files/25719123290.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/weselisinalonumuxozav.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/10975444357.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/waxidarazitikubefeg.pdfIn PDF document text
    • https://matagujrischool.com/admin/imagetemp1/file/86359217717.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/799399302.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/18054941683.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/53130846994.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/23cc85a1498a09263739032389e93092/10099994766.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/87175277358.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/57321960336.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/82958170845.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/zojoxagukalutatemunak.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/51832243395.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/2c970dc1a8a6250d8aa42b29d4df131d/30486900086.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/30142079395.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/14347385396.pdfIn PDF document text
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/sanemokiketokinizage.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/93514789356.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/vapawumositozo.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_off0000b24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA63 10616 bytes
SHA-256: 9e7a677692eed0a42aa70edf72304587c31a8a5437bf8d7f592de10c807a7716
font_02_sfnt_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 16188 bytes
SHA-256: 28a4be4ac5c5971a6b179cdcc03197bb397722dbffa7b35359cb4761b498142f

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