Malicious PDF — malware analysis report

Static analysis result for SHA-256 295a35abe03a03a9…

MALICIOUS

PDF

60.9 KB Created: 2021-09-21 02:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6b6a17437ef201ec2e82f28b33b6d45b SHA-1: e50335e6840af51b6aaed15962ba332fdcdb308e SHA-256: 295a35abe03a03a928505d6f422c963914953c07a970c4771c5e1e8bd1fc69d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF containing numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://drafthe.ru/uplcv?utm_term=ublock+android+firefox PDF link annotation
    • http://tchid.net/userfiles/file/tegazivobetiwav.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/84571239570.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/bikarazenivu.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/vujidobalazulisesewosag.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/lowapipipagim.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/77254700285.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/nosobemumutupojutupol.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/tizumafosuwolerafofi.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/21/zokavizaxafenolo.pdfIn PDF document text
    • http://ranch.pl/files/file/jowadugo.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/94140713009.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/xokalam.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/57530077073.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/gutafuwakudiwewajixig.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/7381007441.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136249cb84b7---52311629656.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/9140361365.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/38030622114.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/78349a3f8da27a1f1d05a1dd15016524/85134614708.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210916_2930571F36290195.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/161358e78d9c20---tiramigivujo.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/retosesovapema.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/pavufukabo.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/muwilosapetifoniz.pdfIn PDF document text

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