Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e202a65f38dffb…

MALICIOUS

PDF

85.8 KB Created: 2021-08-22 03:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 83252174011b8d9673ae8268aa2d65b1 SHA-1: 0953a4c5c4c386d818665373bc80f17c6ddfaab8 SHA-256: e4e202a65f38dffbd2cf6d69248d7a08cf69909f0d0df13512720843361110d1
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to potentially compromised WordPress sites, suggests an attempt to host or redirect to malicious content. The document body, though obfuscated, contains elements that, combined with the heuristics, point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ebd.su/UFD/7623/files/18291535592.pdf In PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/84754217126.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c56cdedb210---butomonisej.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/soloz.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/vanajesotigawetasafo.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/0iep9vegiis4tjaogk27hkorr7/watadiwatiguv.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/zakivuwaranuvit.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/pukozujubakawutokugurubow.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/dac3aad21d42622b38c334cf398612ea/negasovule.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/lexenivopijejo.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/8067448190.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/vadaxevekupevugini.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078222842d89---topijajanevodubanexab.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61149527933.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/495bunbq2ui9jtpropjhgtajdq/17606220116.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/849750804.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/a82bbaa7ba12cfc8bec4e47ed93c8c8a/41680349401.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d8d209bc7cfbd50154b6661841d74758/zosoziduwizase.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6569ced11c---60794972591.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd80875d43---gipulusejatezuzoko.pdfIn PDF document text
    • http://geodez.com/pliki/file/mesunilefusiw.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b9f0c9fdf---lifetijolexujulevaw.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c15890974---48612012358.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/77676612780.pdfIn PDF document text
    • http://tavio.su/files/file/kuvaxetowibixegewarezo.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/turaxari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=crack+de+logixpro+500PDF 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_off0000e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 10800 bytes
SHA-256: 25e3b850bbb9fb31586de236c0ad65b29929f55d79057ff5b9d6370fb4b7d85c
font_02_sfnt_off00011713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11713 20124 bytes
SHA-256: da300c56c21f655d30832ac7b41f90f857f06000e3014b7cd9171ea5aadfc1d7

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