Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ea0fc25b947e4d…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 14:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 552cbde30c99a230a6d902e1e24cabc9 SHA-1: 6dbfe4ecd6fae3bc7e826c74b70f6897fb07b0bd SHA-256: 24ea0fc25b947e4dc98df1ac659f2c2838e748992381fd0d209e7e057e5dee3f
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to host and distribute malicious payloads. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a deceptive lure, such as a fake invoice or payment request, to trick users into clicking the links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://queure.ru/uplcv?utm_term=sample+of+deed+of+sale+with+assumption+of+mortgage PDF link annotation
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/10d7e1cebf6ddf34bd5dd745a9b3f150/45793749602.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/0nq053pcmopehsiipb8m8jv575/bizafotevakedo.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/89653138823.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/zagusenirowujep.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/994085a305f141c308d831dac8a1e6f4/webolosura.pdfIn PDF document text
    • https://menu2uplus.com/images/file/fawukatedopomid.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/170089264.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160906735d072f---wagabamig.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/85477426769.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/6844033383.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/tulunimekirapulosizeduret.pdfIn PDF document text
    • http://matras-devison.com/upload/file/65258575080.pdfIn PDF document text
    • https://fuoriscena.eu/file/71362822590.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/zorul.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6341e482---torikaregobofak.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948c16e222f---54672226811.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/fa390fb6b58446cb153991355791089f/43197848038.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe7a6ec33---wosojotudunefidatafoxu.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/24453918167.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ce676fb2f0887791525c5561012e509/fevinovipexewoxejufedavo.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/fulomigubibokuxi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/f4956a809f26e48cdcb480daf2238fd4/gumojasuritewuvo.pdfIn PDF document text
    • 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_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 16624 bytes
SHA-256: c5a286478f8fc0187c8cb4df98dc852ef15f1adfed6c477c063be280ed44102c
font_01_sfnt_off0001137c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 11208 bytes
SHA-256: 18ef3f8a3f7325f7efd8f8188894208025f5f40688101ce1ae5e5644db1972a7
font_02_sfnt_off00012d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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