Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b166010829f66c…

MALICIOUS

PDF

74.0 KB Created: 2021-09-02 01:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 197acefc82d1fa75602ed8c2a2c3fa58 SHA-1: 89454c238f204d74ada54c15111c2b62d335b411 SHA-256: 39b166010829f66c82964cf680b1557da1fad96ec92c327168ac1f35865712eb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3916

Heuristics 5

  • 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
  • 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://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/pomodumeb.pdf In PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a25930af093---lawaretakekiwole.pdfIn PDF document text
    • https://digireg.sk/upload/56169700574.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/89929211580.pdfIn PDF document text
    • http://espwireless.net/uploads/file/46427950835.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/83558988306.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161146918ed751---42817042427.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b122987db1---wubusivugolenigafaxoru.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaef3a2e00---jurijesuxabez.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/gikatepira.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/6851854879.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e06be07c6---rovoxaziwujafitejof.pdfIn PDF document text
    • https://energooptima.hu/upload/File/renagorazibegevedavol.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bbd3d9c95---sukajokirenusazifepewi.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/87019439322.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/zuwexiwavemasobife.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f0b1e7f6---zapinosibamafugam.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/3109651197.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/59154893686.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083590bba7a0---49573776167.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/beruxoteridiju.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/jifofu.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/84140342362.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/bksdqubqsg6g8n29cvp1183to7/97224133311.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/jesaredegizewedonowisav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pokemon+fire+red+rom+zip+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0ED 10632 bytes
SHA-256: a9e3181520428725ca7683ecdbbdf67285bfc7c832d0e8bb6625ca9136586bbc
font_01_sfnt_off0000f947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1