Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e084b99170f1ba…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 06:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 62c0cfd24c5fba033caf977f0b5fb23f SHA-1: 724fad89c2e2a7554ed7dc6daa52fbc8c8a39e43 SHA-256: 02e084b99170f1ba0198f927ffdc98ca15b356b464ea79b6c615517a42b0d6b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a tactic to obscure malicious destinations. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/3547337ca8d3c2879a063c5d92208ee5/gujaretalejifupajepajebav.pdf In PDF document text
    • http://musicpark-live.com/userfiles/file/98420673972.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/42428338360.pdfIn PDF document text
    • https://slide-bearing.com/d/files/20606056020.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/zasav.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/nedes.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/30751719004.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/rukerobijodozirujuj.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613728af39f10---17422148563.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/kotovufareregixazesenafat.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/logivebudosikupuluxa.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/tazokuwubagabeju.pdfIn PDF document text
    • https://cartolmania.it/file/zikepovixo.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/dasininevugusijoposesavu.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/87784227956.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/38007963263.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/9987868856.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/54459283332.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/10461163365.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/tivixowimajel.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/mokilevofenuxosojofedux.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/12010901530.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/16350915145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pain+live+wallpaperPDF 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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 17204 bytes
SHA-256: 38c7eb7370b0e0ff0b6cbf2fba80d4cb67dcc31b674b78933e568ccc2f611821
font_02_sfnt_off0001227d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227D 10012 bytes
SHA-256: fe28c6e38f5a479e5c630801161416c88c7f9b59c8f19ed05411a240780c7d1a