Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94fbb3aad8cee49…

MALICIOUS

PDF

53.9 KB Created: 2021-10-15 23:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 31c09a23e89e6c66fa0bd3aa20b465b1 SHA-1: 8a6d4d5d1c539018a238d605d260091110108274 SHA-256: f94fbb3aad8cee49a84ccdee155351bac6f23845dec4e5af80f8dff79a8d2b04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a spearphishing attachment used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8263

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 http://flyingwedge.com/uploads/assets/file/71212042224.pdf In PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/kilevuzosenuwetape.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6e7323cd96f56d06a3ee4cbc59006a60/vagebopidojude.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/24408692085.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/debetotavava.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/vapepadawofoji.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/zotekubumikokereninonawil.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/jaxiloxupisuwupofonazaduv.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/lebejozubos.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16167c22898709---35562582214.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/zikojenuvabopevuxuj.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/91808553393.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///wokiraresobuve.pdfIn PDF document text
    • https://successalpha.team/upload/files/gumusopokozavega.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210927172148_1040019325.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16160867beb231---52761000016.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/8230500838.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153f14c7b679---80938324985.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/xemazetulone.pdfIn PDF document text
    • http://master-vin.ru/files/file/57438886006.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/gidiwanunumi.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/58587738447.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161584b9de185d---64712096348.pdfIn PDF document text
    • https://olterus.org/contents/files/62017714198.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=freightliner+xc+chassis+manualPDF link annotation

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