Malicious PDF — malware analysis report

Static analysis result for SHA-256 455ab9ae1e101be7…

MALICIOUS

PDF

41.5 KB Created: 2021-09-29 03:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b0d4bb3be1b4bae3351f3397b23545f SHA-1: ad2369369dbcea30a72c74f9510e09b64f79ae3a SHA-256: 455ab9ae1e101be7ee420eb35bed3939ab3508d2746ce663ed57fa3688de543b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Multiple heuristics indicate it's a link farm hosted on compromised CMS uploads, designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7020

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/f3f1699c566aeacb5c2ac4d8dfd5f145/gizixagig.pdf In PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/59729644497.pdfIn PDF document text
    • http://rapet.hu/files/61469254162.pdfIn PDF document text
    • https://istanajp2.com/contents/files/vanezagonexagorudibezu.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/32103823949.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/wugetufowebusuvi.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/42229758897.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/lireribuxemavakedivafu.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/tadapizugetigadusizegi.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/lepewunixolekixigosixenak.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/81221057332.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/riwomilene.pdfIn PDF document text
    • http://www.grifin.sk/files/zaruxiwabedejokiluv.pdfIn PDF document text
    • https://spyboarcams.com/files/parisunerizam.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/dasufalidosu.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140840125372---62119965628.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/zugapibovazelebo.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/safafi.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/31269571335.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/nilidaf.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/09b52ea4fd97e046e548b9092b291f9e/zujumozo.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ce7c6ba831e16a0fff946e800c9c737e/bidokeraridevixa.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210908_50FCF4EB36DCFFD0.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=spiel+des+lebens+android+kostenlosPDF link annotation

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