Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f97a247b67712b4…

MALICIOUS

PDF

48.8 KB Created: 2021-06-27 09:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 0655e5917ea4dc0c62a737faa373284f SHA-1: 290d2d3afdc429a05a74f96a8e045cb073caa56a SHA-256: 4f97a247b67712b4e6cb7810cf5d87c5e74069d9d1cf1c2a6a47c31f4265f3c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted from this sample, but the extensive use of external links suggests an attempt to lure users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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://ketchas.ru/uplcv?utm_term=hold+my+hand+hold+my+whole+life+too PDF link annotation
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/5657914fcd1ca1022fe47f2f1a31dd1a/86515417795.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/75208812162.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/66813979934.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/4093353622.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b388db2c4c9---bogenoregozanakigorumeme.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608efe5676617---77780458006.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/giwonepumawida.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f848f855---27058306741.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16086d37460e8f---buselomaretuposako.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/69914264732.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/mlq05she7fcefrb91je7hh1ovr/poxizalasovepanitinuja.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/tunomuwuvuxijotilora.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609834772a77c---1868315998.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c38cd466---rawovogovenisap.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/449242163.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f6d4dab89531f30fa1007921cf9deb4f/lunimezofen.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/norud.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160971f5a34dd3---zijafexutetovenijawevamof.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/35824537732.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c4aaf8bc---dojuguma.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/slgfsi6kfs6f599j9sv36kt57v/42565546908.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/bisovakenig.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/69640155504.pdfIn PDF document text

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