Malicious PDF — malware analysis report

Static analysis result for SHA-256 4037d484ea7cbd19…

MALICIOUS

PDF

64.0 KB Created: 2021-09-11 20:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b60edc3ab60fa022a8bfa0d81fac17bd SHA-1: 5b92d2de06116d9eab89d1d7558af40c54a088ee SHA-256: 4037d484ea7cbd1952eb9b06eefc2b603b2e05ad500a172de6f716cf69091688
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6405

Heuristics 6

  • 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.
  • 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 https://ndmoyun.com/calisma2/files/uploads/11078464903.pdf In PDF document text
    • http://scarpatti.com/files/gagufu.pdfIn PDF document text
    • https://camphacement.vn/upload/files/bamanub.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/73659222031.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/fuvapan.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/45124203480.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/nonagogubutizetise.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/ziroxoliwekononiwiroz.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613333569b2a3---30164673039.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/78003420907.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161323237ae3d6---sakosiberogazaxesejefoke.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/potozabudinevopumopetu.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/8be392810995d3fd085e75fded7d7c0d/dagabimomox.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/74031861812.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/69441361567.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/guketinodibabaxeritutu.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/38162143050.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/zemurebopibulitot.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/lejeb.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/68067109793.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/buwazomakif.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/wovukam.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/wofamez.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/vitonenemufipipexodapos.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/wakologupokabebek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+connect+to+internet+with+android+phonePDF link annotation

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