Malicious PDF — malware analysis report

Static analysis result for SHA-256 133fecbcd922bdd0…

MALICIOUS

PDF

93.7 KB Created: 2021-09-06 11:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3cf023c8e2f0396e0a50329baa385b9 SHA-1: aa7e2147042ec58bc289c922f8ea62ce32bba973 SHA-256: 133fecbcd922bdd08b3295e01dc4010e58d4379925a585e3907b2de82bc50fd3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress upload directories. These links likely serve as a lure to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5709

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 https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/bd68b8364ac7762ac2effe9d7ea0a2a7/tisajepawotevepojox.pdf In PDF document text
    • http://manhchenang.vn/webroot/img/files/83662964959.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/resejulab.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/91128930341.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/95665166517.pdfIn PDF document text
    • http://cutskytools.com/d/files/xezezubape.pdfIn PDF document text
    • http://jinxinghotel.com/uploads/files/kikarotilixeborozoxobit.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/50739266995.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c72f404d---fobubemenu.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/togod.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f11b87e3c---xolekumufiluzupukelofiriw.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/35015260788.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/xuzabejivoxuzutoposiga.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210803_133333.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609014ad71d9b---jirezikevurar.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/8065072871.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/38854047810.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/toxevegadaru.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6b0990a16---33268190362.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/dasagukebebatidiwufubip.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161115ce482ad0---42311933074.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758064dedf7---vinolav.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/linub.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/64901806919.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/nugikiposotenojazumekab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=kinoton+fp+30+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15891 10504 bytes
SHA-256: b2e8ad3140f42737370733caaa41eaf1859c6ab2f130f3e9cff04cf4b1bc2e17

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