Malicious PDF — malware analysis report

Static analysis result for SHA-256 565362379aabb3e6…

MALICIOUS

PDF

83.3 KB Created: 2021-07-03 15:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e19563519cfe4d33a8cf9ac83c1b1560 SHA-1: df46faaa373451d932724e1c9e29f4d23e662d07 SHA-256: 565362379aabb3e6cb0c1897aec6c95b0566eb917f8e49ca516242f1c43d33cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to other PDFs, many of which are hosted on compromised WordPress sites or disposable hosting. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick users into downloading further malicious content. While no scripts were directly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt, likely using embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • 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
  • 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://studiotrusso.it/userfiles/files/zineve.pdf In PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/153721039ce5fe3b1eb34408add4625e/62381160600.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/20273284700.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/vibuwiwepeposisile.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/31493998706.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072cc21a1ad6---89041220015.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b478141cbfb---wesuvuzopikupanikofexiju.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/mobob.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2bbf8b096365e38835463559ebe5b691/buzujiteze.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/0ed0ea5b210f91244d75d0586da21e4c/gerosipopejanetevibo.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/rasudipopi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad818e3c6ce---fuxefamafojisupogonude.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/82633279164.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/venarenarol.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/xukuzakopenejoxakebidugov.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/feee5d48cf671f8f7ef6d1c6cdf08a89/xabuxededikeseligaxitajeg.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/29446136693.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/87489929980.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/zunovitekegijijenarus.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/zupipog.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160743049e7fed---vodevinepe.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/71904311903.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d242197c5---44437123724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=accounting+policies+and+procedures+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 10876 bytes
SHA-256: 377d430ebd1e8c667539debc364c12def526b8a86b53c74e61606ebdac693132
font_01_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11254 17480 bytes
SHA-256: 3b3ec3a63ae1dade90693f2731653c48d6c1b978b145c196f952e7a7f0f1eba5

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