Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9f38ed950d211b…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 22:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aecf25ac4ac1cc31ad8dbf4c53b4c3cd SHA-1: 08b9cac3130fe9d13cd64e92b11917d48589ff9e SHA-256: bc9f38ed950d211bb963de9769bf05a34823c0c0e234a1cb922a854652e52d85
124 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The file likely serves as a lure to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f4922f77e---3389533785.pdf In PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/mkjlc1li2e5mp8u3a80thoarb5/80734669790.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/62h5tbpm12v95hh318q113obd6/sosufepog.pdfIn PDF document text
    • http://rahway1968.com/clients/5/53/53e48f2724afc57738bbbcfbfdbdad27/File/tajuzub.pdfIn PDF document text
    • http://biomehl.com/images/content/files/104646275.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/4280175880.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/77099585883.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/59439599833.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7405b0123c---3043338768.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/07q9r78gq8nlr2sddjb34692up/musigagosepogo.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b164fad28df---deronuvux.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd88894f611---15347585107.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/38604751941.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d27f7916e18---gavufixogedokop.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ce9d983bdbeb6eaeae3f65f27200aaa7/64470438256.pdfIn PDF document text
    • https://auto826.com/uploads/files/68507904940.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/fd51a4ed6a9f16dad8961dff2e327960/zemovuzidirisuzanu.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/4917372a81722e17f4290994fe99310b/kigiwepepopikiwe.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/varenuvosexozotela.pdfIn PDF document text
    • https://businesslife.com/content/file/ziwabixuxez.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/meteviweno.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/54878552096.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/75613713981.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/4d737fa6b02309eecb937e7150444bb2/famaxuwoxogozabobebajewa.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b730c27c90d---65184437663.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/gojigurizuxabanoresu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=subaru+impreza+wrx+sti+2008+service+manualPDF 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_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 18400 bytes
SHA-256: baa61dea43365c224f4c7f1f30b89d6606005e5dcde4289bbb1a70f472208a41
font_01_sfnt_off00013641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1