Malicious PDF — malware analysis report

Static analysis result for SHA-256 89726b8d4bca4626…

MALICIOUS

PDF

72.6 KB Created: 2021-09-18 22:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f02d6592bf9029cdb32a887ce373e60b SHA-1: e6f6d20e5792a1f3f9dda185ead5992c0cf0fc68 SHA-256: 89726b8d4bca462674f88f0860a4916ad4a7332a99da5d65d43870f4936782f5
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to websites hosted on compromised WordPress installations or disposable domains, indicative of a link farm used for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of multiple distinct hosts and the use of UTM parameters suggest an effort to track link effectiveness for malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=minecraft+apk+free+download+full+version+android PDF link annotation
    • http://hzzxtl.com/UploadFile/file/20210915212136692.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/61634219849.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/31967622755.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8a5727e99---sodisavola.pdfIn PDF document text
    • https://ms2oke.com/contents/files/71361546412.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/63413004117.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb2d107792---najitaputobu.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/38665045554.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/31543355375.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/23752583016.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/kagilofadofujuvuvan.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/fapiralevizogupuj.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/sodawarojata.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/bofalufulolosunawamidago.pdfIn PDF document text
    • https://tavio.ru/files/file/82622532019.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/rotulukor.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/90631505954.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/bopevimerimojiv.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/zajagurubikedov.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pusomubejabuzaver.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/daratelofosezabelasuf.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/76997822603.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/jutime.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613da5153b4a3---39724891114.pdfIn PDF document text

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