Malicious PDF — malware analysis report

Static analysis result for SHA-256 68529801beed8b6b…

MALICIOUS

PDF

87.7 KB Created: 2021-09-03 19:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 886f8d9e3ae1b89dc876e48489ea0c68 SHA-1: 5cb456f0402014897dd577db30aaf931e44a7d62 SHA-256: 68529801beed8b6b88b6a5755dd264ca8d1847c813521571475d328d6c4f69fa
180 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/kurafepipodufaz.pdf In PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160def1b9a3ca2---57375503075.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ddc66ce038d40e11d365dcd15d637c26/jofojafumifago.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/39538971483.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/10137884011.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090c39ea4e0c---wemevoworilite.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4e61de5e9e933ef9439b337537b14650/kafanej.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6cb21055df88ec822964e6887a797b95/tuforamif.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/8690305ce6eb203456e84f266e874db3/pujekobibomokis.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fb68816a40e70fb44f9811edc960f61b/laparabiparavofusenej.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/3b52a38fd45751dae10ad06d8285f1ec/11708643611.pdfIn PDF document text
    • http://sinners-party.de/media/file/95396581365.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/97120583401.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/40358303836.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/b189494be5e1ac31b72e9b813fdafa75/fuzinaturufubinaxujora.pdfIn PDF document text
    • http://camonetinternational.com/files/file/87551980588.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/nakuvuxijekaranojujelobap.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/wopixi.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/tawexenojosigit.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/legarudefo.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/sajazinumuwofag.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e13679e2f5b---21726756165.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/445a99a4aaa2369fc80969274193887a/75467932927.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/27169746060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=class+11+ncert+biology+text+book+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 11328 bytes
SHA-256: 1ee163df05ed5796c0db370f4b8fd330b84a737f8cf019299ea37653e4700283
font_01_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12057 19084 bytes
SHA-256: 2efa01e24f279e21aa175916cf6d067607eaf0e60e0c2d32c504886c8b7aef50

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