Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fa1376b4c77d66…

MALICIOUS

PDF

85.8 KB Created: 2021-06-27 23:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e7be6de9b343dc4f97c05c3a6edb0691 SHA-1: afd2b57f86d2120ee1ae9fd69a863a5cef6bb822 SHA-256: 95fa1376b4c77d66d22b0e7d23be373ca4a33c5ff5c4ba1b23e3e3b1e6482224
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifier indicated maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit user trust, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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 https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1a7af141928943006617dce8e49ba43c/sarivi.pdf In PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/sg5j7rk73cofpjj0nqmldkivh5/56216128541.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb1c168e20---78966901926.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/waronopurotobinubar.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/5a77aba6639c4e519761b1f2fe621522/senajimimilonetedonedapa.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a292d252ec---ketirexamorelenepegoneku.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/gejuja.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/48104113199.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/77680417101.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a42a9698562---muxowuwosixope.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/474b52446907a0edf56bac6627fbc903/47727508505.pdfIn PDF document text
    • http://bio86.fr/fichiers/48765409275.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/uls7l6usluo0i82725vc6h7t4s/xezipodafala.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/aeb7dbe76e914343208dc4ecfc4afecd/25937762875.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3c210bdb0---kimulanesaparikas.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/pafukikuliletusures.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ql5d2sebprbos05680tf2h9gs0/75577717817.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/2fc1a3ddb8de624febeddae1347bda05/kuxuxutemapenogirikip.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/96918141053988111c637cb0560c0737/60726861081.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a031b6bd---85750964646.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c133abdbc72244f28bd68786ed9b071a/86776868812.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bf9cc4b71994bb358902bcee13fb9699/tuxilebememasavo.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/49360541923.pdfIn PDF document text
    • https://immobilgold.com/file/71559108195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=td+bank+travel+noticePDF 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_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 10456 bytes
SHA-256: fbab9818360a5016ab475bc965d4d89a08f5fea6cd41deab40872225ad921ca0
font_01_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 17272 bytes
SHA-256: 377c027d0fc7b8fdaab3d88183cb8485b55a44e9d842cd059f61a614dc549960
font_02_sfnt_off000130aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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