Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2a881f494d4f4b…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 13:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 05cd8d8db216d265caa91c8b58b5f967 SHA-1: d056b9c49d943e94c729c982fa8f195f8a650068 SHA-256: 3e2a881f494d4f4b34d6aa56ad8ae9896435edf29a255d0f076f2f937dd5b793
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Heuristics indicate it functions as a link farm, directing users to multiple domains, including compromised WordPress sites. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3255

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
  • 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://suamayin.biz/userfiles/file/923563803.pdf In PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210830_B3CB364775287799.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/79056827478.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/mudusobuz.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/64778086630.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/ragarilafidax.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/gurusorapiruzuju.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f047340c7f---vuwedabosemiragisu.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/saxumunozuwuvijunaliga.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/4e95da4e205f91f54326af6bc5678e33/vobepixexonefopatumo.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/mesujukunumomo.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/10579811876.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/ditaladegisejoguzimekuxip.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/mefoner.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/28278990294.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/4884340517.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/10f460a9f8953348aa058aabba571cce/17641043564.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/faropep.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/vawoposamapuko.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/68469463214.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/90843057725.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9cc3149e9a95144efa526a4d785775fa/98488267924.pdfIn PDF document text
    • http://huntland.hu/upload/file/6042679155.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/80111195152.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/31161614586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=bomba+para+fumigar+de+espalda+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 11036 bytes
SHA-256: 49227f2987612c065ae15557a2524d7cf1533da45f9809f2233cb168703b76a7
font_01_sfnt_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 18460 bytes
SHA-256: d4f88106ad0b06cbf852613ca5b81d25c3512142f16a84513286059e8086d405

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