Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3b6ea6c975c4f8…

MALICIOUS

PDF

55.7 KB Created: 2021-09-17 15:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b3bdf55a6f504584eacd1ff4d27d4d1a SHA-1: ef46dc7b8f1b7562ba572b65c2469096f19f8a3b SHA-256: 2e3b6ea6c975c4f8db19ea696cb9bb6af091012a60d59ea3e15a3a936015a348
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9258

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://catamma.ru/uplcv?utm_term=infinite+flight+apk+latest+version PDF link annotation
    • http://rasmesafar.net/basefile/basefiles/danakezakirezom.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614211ffc5d4c---80832337228.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/22715772060.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/buvilibabukoweweviragobor.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/fibixivujuwokuj.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/duloso.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/lufizorowi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340963d6bdb---kizedavusejizuf.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161380c9d807d2---70255104506.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/1114737162.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/1551918864.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/zasibaj.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/60740510998.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/rijibivojitevoviwazinenuk.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/99488596111.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/roliw.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/morivojuta.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/71825028388.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356e8ee31c1---99828153782.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/45398057552.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/38944287743.pdfIn PDF document text

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