Malicious PDF — malware analysis report

Static analysis result for SHA-256 49939ed30239474a…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 19:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1adc7e0358b6b5084f9f4318c834e6b4 SHA-1: a70f30ed9e6069ad39aec9200775eb06a3ba2d3f SHA-256: 49939ed30239474ae07ac5ffcd227b56fe2e98eed5ee7328f14b9f22304403c8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing users to numerous external URLs, many of which are hosted on compromised CMS upload directories. ClamAV identified this file as a phishing trojan, indicating a malicious intent to lure users to potentially harmful sites. The presence of multiple links on disposable hosting and compromised CMS platforms suggests an attempt to obscure the true destination or leverage existing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4806

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://incoyun.com/calisma2/files/uploads/maporadupemez.pdf In PDF document text
    • https://promise-land.com/upload/file/53633293060.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e66f347bc5---binisukilijuzij.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f2f9cc4ec---guwezasa.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606f217e6d18f---rixobovivakar.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085060439fc8---41747166546.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/45411183750.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/goxanuguf.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/pokaxigesujedados.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/siselumupatar.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/mfq6u3eha25i7r94i7qfn3354h/vabemira.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/t095c1rcf01fksbt1qa40jnvit/nitupolevavajepobivufog.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/46520352624.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/12424142257.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/0e751816666eedac856cd73319273dbd/82567002594.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/50193406500.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1jp6tb3qp0fqkj586rm854hub7/53453996147.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/475ffa2a49e4dfd3f2e9a85cf2638044/97248477965.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/gukesaxapevoli.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763f7074169---62682449381.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/farikumoberope.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd7ee5eb6d---radutelazawoxidesepudoba.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/debaregeligotiwobepatuj.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/92025335272.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa62b2f427---22739466989.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a83dbe9a5---20018964326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=heredity+and+evolution+class+10th+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 18096 bytes
SHA-256: fa2bd1d3ee016f4fb08fd257d262e8e140ce1066397604e597ff79b2d1ae9a0e