Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ca650aaf2951ac…

MALICIOUS

PDF

84.7 KB Created: 2021-07-17 21:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4c4c04c44ea28e87c94c75b4399ce2f6 SHA-1: 7e9aa45549c3eeed4e8262814c20295f64c8b22f SHA-256: 88ca650aaf2951aca02933723fc52901497b81dd510699a784ff3398c9d118e3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://bettyloupaints.com/userfiles/files/16356185380.pdf In PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/9fe8c71f258746fafe4a93a395894bcd/vufumoja.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49f82b9ba3---15981378356.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/11300593749.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/76880493616.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/309e3f2d31c579cfef0b5b5f317e5898/zasiwibi.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/50bb5a52db3a9a2daad7d4e7ca1dd95a/nogivugafufodok.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/13553859239.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2471d3d80---56405398111.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/wazim.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b37a97594ac---weluxubugopelirosowexezok.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8b11e8855---nijoti.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/26849834210.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/17069837841.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ec7317ff2---38311436323.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083624ad9d82---36093946163.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/muxasodizabatakunej.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607589068976f---15120677518.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/rasekesoraxumeluronefexu.pdfIn PDF document text
    • http://gonuldoviz.com/upload/ckfinder/files/91112243407.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd978211f2---62386588091.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/1fe139d09baec4fe8dbaca7598cc3225/68268705107.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/54967734559.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=can+your+stomach+lining+healPDF 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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 16696 bytes
SHA-256: ce3a6c219ee9e0e7c716f3f59cea32ec52249ad8e69cea939bec75c5cab6033d
font_01_sfnt_off00011457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11457 10924 bytes
SHA-256: b585bccdbc16c5fffdef31650fc589170371b42b97940ba92b9773a9c0c9b970
font_02_sfnt_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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