Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2490beaacfdecc0…

MALICIOUS

PDF

79.0 KB Created: 2021-08-16 15:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4fbaab9eb64b642dce13877b1166c0ac SHA-1: a97a2fc43582a4e421f419ddae65197341e6452b SHA-256: f2490beaacfdecc04027cb3739363e642dc4c2a24ac71a43f3c3faeb737e70a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm indicate an attempt to deliver a secondary payload or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5079

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://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/mpnj0pji0c2k8qkb3ahp9ba7rg/dazemolizurufetog.pdf In PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/tuzalugani.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9855599182.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/457a48b2e6699b7d2d388e2a3dc5388e/jojizokuvigejegawomin.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6vdjk7cp059sac49u4hh94ml9s/vonesepo.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/gixotepom.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f7c1c4e0f---zegoruvidikav.pdfIn PDF document text
    • http://zahradysnapady.cz/soubory/files/94323451504.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45435628409.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021072819484573499.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e19b8b2a---rasevikabifuwizibukosita.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/rp60r07jh6kucid94pqqeslceu/maxupufodazulivipo.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/xebovepexonu.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/68720447941.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/pebomozeso.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/62953096024.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/ca48f7bc77354278f413a2ae1a3de5cf/wuxiriwufuwenejevim.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160acbc7cc5a7b---weduzeloveri.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105261043292897.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/38373913693.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///nexepibesi.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/xuduxower.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7483e9b428---34456581407.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/sajen.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/3104112275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ghost+full+movie+download+in+hindi+480pPDF 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_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 11364 bytes
SHA-256: dfb197eb02fc97a8eea180083e1ba948259028905748cd98496b9e221ee46f7a
font_01_sfnt_off00010896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10896 16816 bytes
SHA-256: d912ca2ee9deaf99a1a5351b25287178c70960ea71a5dce36eeed0456f6c7351