Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a42af681581433…

MALICIOUS

PDF

59.5 KB Created: 2021-09-07 05:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7d7f67f76bca587a4883b210f3117def SHA-1: 625502dea366f71fb480ed27ce21625a0579755c SHA-256: 29a42af681581433d0ab89f1991aa3058ad19a1db0e3a059e4ff94a42dc6044c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. These links form a link farm, a common technique for distributing phishing lures or second-stage malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tunglamgarden.com/images/fck/file/gogebazinigekufopeko.pdf In PDF document text
    • http://giasuminhtam.com/Images_upload/files/zubijagavivoxe.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/woderisujidejogi.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/sekomuxewisalajama.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094c75f3b18e---56889567890.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/96214070211.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/74ur09tiap9pemn3mqa1ptel91/76588209286.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16099c81aabadf---71090569605.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/jidivuwanevugidugar.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6e49571eb92e69b41f9c77b1d438bc53/78305686341.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d475666f14c---58745144611.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/nazadafopum.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210609100300_m5zfgf.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/meg120s71lrvmbo548hanvlg85/57117089592.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/60520db75e1cf2e8ef89a7dd56b8788d/mofogafupedufulo.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/xugaleguwatolinatep.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/53401690620.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/xivisubegolifakawigiru.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/c9cc125e1d47f439f85aee8ad6bca410/bovujodimu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f7f050208---daxemuxusaburoperirom.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/wutubogewovamelo.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/4fc0799072a58d2d31fabde1c426e180/37683959793.pdfIn PDF document text
    • http://thepducphat.com/upload/files/2075357909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=branchiostoma+lanceolatum+pdfPDF link annotation

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