Malicious PDF — malware analysis report

Static analysis result for SHA-256 959fd80720fb6df2…

MALICIOUS

PDF

91.8 KB Created: 2021-07-09 13:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a69f46d869da75adde78cd8f5f01b021 SHA-1: 26735bc4ca86a12c816d593d200c9e271f7432d4 SHA-256: 959fd80720fb6df210b5135e5cac734ce2e7f124e3c5d791d1e2b1d452c91c5d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, with multiple heuristics indicating it is a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of numerous URLs and the 'invoice lure' heuristic indicate the document's purpose is to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://share-world.tw/userfiles/file/wumokuzawagafolomal.pdf In PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/81589727689.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/c730d8307e33fc2608845b2f431291e4/rediv.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e33cc85687---murubadasepedorevijufuwo.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d59916d9a---71566014757.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/62412603264.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/xefidabegetixepovibixokek.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ltsbvup4s12as0oocan4omvlb4/15177404934.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/88mnh8iha5jqk4fh3dajoqh8p8/14054764138.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/70183211847.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/fakefodido.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/buxapekedoru.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160de022dd2322---13497443838.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/zupobiru.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/zanajitagavovo.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077faf21b557---32610886332.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1a24d43996de1d3c9a6cd25e880568ef/lusajuwisifusewagisevil.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4da3feb6d0---rozepofaxixuvotabe.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/fdb2e59d8e604315f6be11f0b44f9062/77118890019.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/46283219481.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/58032c1d419c7e030ddf27bfb186b08d/xixarewogafawaworuve.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xigobomu.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/nasolej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+second+endorsed+checkPDF 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_off00010464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 10504 bytes
SHA-256: c47a2ac9b37768af6b4d226f7c90e30800ed5dd9a97d3307e0b9403db2ec801d
font_01_sfnt_off00011c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001345e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345E 17548 bytes
SHA-256: 1f63a25f64fec42fc913f3d6b95245c2bcd49b705d3702d4ffe388e500347915

Open this report in the interactive analyzer, or submit your own file for analysis.