Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d487822572203f7…

MALICIOUS

PDF

61.5 KB Created: 2021-10-05 20:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 638d2066ac91af4f7836ab3505182e15 SHA-1: f38a58b542099427ede64c6c197053e7600431d6 SHA-256: 8d487822572203f780dd9646a709a1e81f98bccc90e5827316ed3d22b065860e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to potentially malicious domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using many distinct, disposable hosts, suggesting an attempt to obscure the true malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely leveraging social engineering to trick users into visiting these URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5194

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://istihdamhaberleri.com/upload/ckfinder/files/58537274779.pdf In PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/zixikodusivira.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/gutubewurugiloxadeki.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/zomezutuxejebexojibipu.pdfIn PDF document text
    • https://yourwebcenter.com/files/file/mosubemenexixulovebiwevu.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/vetunekadow.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/89118563650.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/domaxigugomusopixavuki.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/1055567075.pdfIn PDF document text
    • http://eternoohydro.com/d/files/76951054810.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/63646771077.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/28869736143.pdfIn PDF document text
    • http://drdj.friend-match.com/upload/files/xanix.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/velemasitupopeg.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/zijizavejufefakazurew.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/vifoze.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156f5ed7b185---najoluxuteziworozuwa.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/gawepuzojapam.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/kogurijuvi.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-27/20210927010633869375.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/93979970592.pdfIn PDF document text
    • https://linker.tw/files/pudoluzutugijivinubebej.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/zefudenorivizajirame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=happy+birthday+best+friend+sorry+for+late+wishPDF link annotation