Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75d7fdcfbe43d37…

MALICIOUS

PDF

73.5 KB Created: 2021-08-30 23:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 103f84010c40885b33a665844ee285fc SHA-1: f761f1a8d8eeb8be117e5258bdea85cc9624ad09 SHA-256: a75d7fdcfbe43d37e921720ed9470461d1190c0a0c41f9ef8b1a6cd123890f1d
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating malicious intent. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4113

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://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52476167511.pdf In PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fd320e6887c47c1b98ccb8a04fb296f1/41173173625.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/vuzojuwonex.pdfIn PDF document text
    • http://deauville.ru/files/file/7662740087.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/11a0f46744482b4312afb92cf93947b1/galexibiwesomumofepoja.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/lotono.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/zajokurikizuretuxigoso.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0ff5dc1699ee61e3b79593e05f1df36a/pinazeromojitokoxu.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16116a4fdeb7be---49034662337.pdfIn PDF document text
    • http://lscapital.it/images/file/fotavig.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/3i6dtotv5l54t0b3fv9ki29dak/difigezute.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839b8d3e213---zaputemuvod.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/63382874899.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/i680811kgeg2aprubp82j4o415/65650767764.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0043042d3---giwit.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95618f6ef---pefima.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/92794160097.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/runejura.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/56f5b7aeaf0cb40ddc98a0e7b1f18f83/gowor.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/h7e0dl7sums3il93a9869k0np6/52848476584.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/tejaxojuwetapadopejik.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d7d3f7fad1be2e94573ac86ee93a9c41/vozitikuwavubosedik.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/vblrjh5v7p125r1t42shft9jcg/nasevuxaxusafo.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117af3101466---relaxumotekizul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=long+day+plantsPDF 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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 10312 bytes
SHA-256: a8238e699aca643ce3177c90cff0db8c0d062602af2e986939ec246f51c69171
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 17672 bytes
SHA-256: 13eeea333457f193bdf21a947c24a68e3a938a2ebbe907dc38d0eb79c701e0e1