Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf2f127a8d07df5…

MALICIOUS

PDF

82.4 KB Created: 2021-07-25 09:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 65c7116e6959df9b70547e02b03d3213 SHA-1: c153afc6e5c7ef57b3fcc9b3b374177d19aaf5e9 SHA-256: 7bf2f127a8d07df5b9440b1f91e0b3f84cd1cb916ce34e3deb61a1ce02073f8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of numerous unknown URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738269b9a63---42285749224.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71cee74923---ximavimo.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/35403086815.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/febar.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/48119885688.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739e4d77a40---gufinuxab.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/0fb584a59d2e085e446757065a95f090/kawakakoxixomeliximigot.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cq87s7gltd85bsvbb6vh1q8hn1/fupitinok.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/53990994735.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/43d9a07628af816c88e695ad0c88db46/zunademi.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2dabe3610---tetenibaj.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/jowivawaxuvakusekoruvexo.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/59109824594.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/r8j0mv5e2q7o4mmbq0gac2mrnd/xotiraxuxefepis.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/921a2775fdc2fb7bdb49bcbf3b674bfa/kolegevevunilumotafox.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/gopes.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/lepune.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/3881202939.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/dekola.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609103d72b93f---kolegidutesupomemekuvogol.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107081351224018.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210621040011.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-30/20210430200521486931.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=should+i+buy+apple+se+2020PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 17868 bytes
SHA-256: c961f9d564d88a5c22e451f1d4e2730761e16cb6ec2cb059b07e78366b68b2e0
font_02_sfnt_off000120d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D1 10856 bytes
SHA-256: 4d50468b55cf42a6618cc3a14d4487b35c777e5394827ed2710b07c5dbfdf8aa

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