Malicious PDF — malware analysis report

Static analysis result for SHA-256 0003fb688c155001…

MALICIOUS

PDF

40.1 KB Created: 2021-09-25 09:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dbe598bcadf6ea25a642b73287f0c3e2 SHA-1: ef44e43b7c2661a2547ea3b6b0ec2843d91f63c7 SHA-256: 0003fb688c15500132201a19d55f5387d0cabc308c743d479ee0a55f2e666571
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 actions. It contains numerous links to external domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 40 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://catamma.ru/uplcv?utm_term=unturned+headlamp+id PDF link annotation
    • http://techmechengineers.com/uploads/powexiwu.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/foxadutaxugor.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/35205351750.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145acfa3bbd2---49263246828.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/popebiduzanuzikoredaxul.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/kiwixetumafawuni.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161445b75183b3---64732239312.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/83574155967.pdfIn PDF document text
    • https://hotelcorona.ro/files/64150375150.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/narufavezatusimaro.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/42476028027.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/85538228909.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134f03ce5099---97156480428.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/logezafirirubolod.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/kuwinagiwumoboda.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/rofunufi.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/58846328982.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/jijekofutaloluworafanoj.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca808b127---mupidirix.pdfIn PDF document text
    • http://guide-eq.com/userfiles/file/20210910070352_bzmnrz.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/lodirizuzarumosurumim.pdfIn PDF document text

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