Malicious PDF — malware analysis report

Static analysis result for SHA-256 97be9822ad3528fa…

MALICIOUS

PDF

76.4 KB Created: 2021-09-21 08:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ea244aed3fab54c6f8c51c1b914afe5d SHA-1: 499ef3b1682d8f62181d986c84b363fbfc9f26dd SHA-256: 97be9822ad3528faadfeb2c5295ab3adb671500f3270fd6bf9d97375cee6067d
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • 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://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/tilupigukomararivatupulo.pdf In PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145230979fa3---70388442722.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/gekogozimosixunolitox.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/21735622465.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/tekan.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/47423568273.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/zazivapazagopa.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/21520912627.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/radedekebovomekopadavisop.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614952d6873a8---tikiwurijuvitivomitem.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/26991074832.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/35003121611.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/24604094040.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210908_42FA8C885AF83894.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/32006429179.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/vurajekexev.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/42178038374.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/gukuvo.pdfIn PDF document text
    • https://ka-base.no/images_students/files/bevefilisemod.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/27382789571.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/21586641523.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/1363987481.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/14618205260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mini+militia+hack+gameplayPDF 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_off0000c5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BD 18068 bytes
SHA-256: fa6ced6c0ef4ea7264be6860fd23fa5cf32a0de059f934af457f813ce55bac8b
font_01_sfnt_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 10632 bytes
SHA-256: fe94751f41ac546249b8f4136ab7255ff506cb10e0889d4fce2490b3165e89a0
font_02_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1