Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5dcfbf1172ed82…

MALICIOUS

PDF

70.3 KB Created: 2021-07-04 15:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8d11b741b9b68f8177fb4205f9c73655 SHA-1: f80818d6303ea03a4a325a47513b555a78128eae SHA-256: ed5dcfbf1172ed82b33d5325ba6a48564559644171a4e2d8c7aa60856f7cb3d1
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, suggesting it is used for phishing or distributing further malware. The presence of multiple distinct hosts and the use of disposable hosting reinforce its role as a malicious redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

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://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/vulekanixiwubite.pdf In PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/9ed7769dff40f44fbb95a8530e8031ef/80549867497.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082767ce7b14---28508483336.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/33828931782.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/3b584342578afcab694523aa97123496/viligu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990f03ec822---63955878472.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/22512110283.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d6f3edee1---70956384059.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cec90ebc65---17640663808.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/39885718479.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/zesisevijawagegofogaxa.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/76145094426.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d94753f0e3d---wibuxopujarukaxolazarafa.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/fuxariweje.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/b5njk7fd317rlpeh7m9qcrd63s/kelejusi.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/7646875173.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974a472323---5829309782.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/8e27963d93cee0f598ae6d47cf232cab/kigaxuxem.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5d4f3b18f---fofukoridesodapejonoge.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061601451538.pdfIn PDF document text
    • http://24cvety.ru/upload/files/92832069748.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/63647906336.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/kqfdikprvrif5o92iknldf3i7d/52023870781.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a449ca1da4b---teguborafevipidefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=jesus+turned+the+tables+over+in+the+templePDF 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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1