Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8a2fb5a7845cee…

MALICIOUS

PDF

54.0 KB Created: 2021-08-20 03:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f49fc44d721f125101081fc96c756543 SHA-1: da9cb7b123848d7e97b0356c4aa8e1b09e145ada SHA-256: 4f8a2fb5a7845cee355aa43487b5f0abe75e89d275367b17cf8288f7d4f2b90c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous embedded URLs that point to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7424

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://smidgel.ru/uplcv?utm_term=thank+you+ma%27am+test+pdf PDF link annotation
    • https://ancoraeducacion.com/images/senavinur.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/lozonaloguzubukikunir.pdfIn PDF document text
    • http://waberry1969.com/clients/877040/File/52710267159.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/62879488361.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/80046396601.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/ed4e45d7e2a36139853c0f6aa422a215/44641514295.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/708b484455791292fc622d57eb2440ab/senebaxituzolirumop.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083c069411c3---jovesuk.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/78780ccd2270b5c507ad9e11b2a2cc4f/11002794673.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/jufaruwupebego.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/srlkrl7s1tffjth5liidurin53/bedar.pdfIn PDF document text
    • https://brod-plovdiv.com/images/88212729556.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fc13ee7124eee471e709df76f90b7992/45804413469.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e14dbba4d---katakirorogemofunabatu.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/25577688051.pdfIn PDF document text
    • http://drshapard.com/clients/73598/File/zadakezororobudapanok.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/93928914110.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/zenizexujir.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3d7357141---kijanilukib.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/21553083805.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/46131656961.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/njsqnnp23aabbd6bm97jus9tle/68035753510.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/bedasopen.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/42889575710.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210517074334_1522753360.pdfIn PDF document text

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