Malicious PDF — malware analysis report

Static analysis result for SHA-256 191914e74b9ddeba…

MALICIOUS

PDF

63.2 KB Created: 2021-10-05 06:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 880632cd4e6af5a53b36e61ad722ca4b SHA-1: 0ad603b0da1db83cc0ee76d6a11fed47f3bbb37f SHA-256: 191914e74b9ddebade339e6019dfad90ce816e761d38b01c5eac13b1ba03f990
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that form a link farm, with several pointing to compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4957

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://chcial.ru/uplcv?utm_term=full+grown+cockapoo+size PDF link annotation
    • http://cleversystems.ru/userfiles/file/21992793096.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/viliniwepada.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/neruvoseburope.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/fbc8bc7c46bd2a34dfc6747d42af7206/vozedu.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/73505186872.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/36553560496.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/fekesumumijego.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/gabotasebifadezosumelob.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/nujegijet.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/vajotofunu.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/wotazitil.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/jufoxoziliv.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/39165085771.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/tuvunarozareterib.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/61378c576aa5a.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/suxazotego.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/zoxozoxibozubumipukixaxid.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/rivaberokevubutito.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109251707449123.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/faxinonox.pdfIn PDF document text
    • http://sksound.com/userfiles/file/jinazulamizulab.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c5502f13cff435927762cf3c0fe93970/jepijed.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613edc36ea057---rezupiluzupepabitalada.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316473a109d---77471119492.pdfIn PDF document text

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