Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29e13eb1dd235d2…

MALICIOUS

PDF

93.0 KB Created: 2021-07-13 22:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2d26986b23583aac26f691642af41d9e SHA-1: 96d0586e2043885a74ffe5a8ad7ba4b5e60320a9 SHA-256: a29e13eb1dd235d26de055a53186fe5a15b40dcbace42377f7509c04c9b93653
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload directories, a common technique for hosting malicious files or redirecting users. The presence of multiple URLs on potentially compromised sites suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • 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.
  • 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://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7m3lsudc7q3q9reljb0oboajv6/52159360267.pdf In PDF document text
    • http://greece-ex.com/images/blog//file/tifivewezirivaf.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/nidekamelagopilalewuxe.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16092009922884---15266831431.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608193ff9afc7---32160825850.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca3db0968d---zaxozubimitemeli.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/48dcb098ad9f8a3db4bf89edb9cf6151/72782760223.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/88t41mjfvlljne5df2gfi87fe3/gamurirazibewejatefi.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/49606393155.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607875ffee1cc---6961423146.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/dd08dba8aaf1682faac9d64d8814300d/wipolesovebazafo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797e37e02cf---80166207744.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/raxinod.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c223d4f9a3---825124416.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/uljll4687qgau3r97tsip417m4/bowefukidunuribiwen.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9627d2900b---26480717333.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/9b8c9a64ab47a73d765161c8081d50df/74019187157.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a65ea889655---ketabebarax.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/q7eoij6jo855smgbmd208a6660/68549335953.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/71454733070.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079877d4d2cf---55206292668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=dragonfire+mod+for+minecraftPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 16728 bytes
SHA-256: 20d121c5fb988c798ab212113fdb86dd22d9c18aa6b7e0a354a58021e671388e
font_02_sfnt_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 10604 bytes
SHA-256: 81f4f203d863158eca7c2b4132dc9b1a2c737316da59a9c7d2fc4292f28aee01
font_03_sfnt_off00012ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE9 16604 bytes
SHA-256: 74bee8ad4f15f55785ee3258dafa62bdd12bc2bef0c9520c20caf90e920edd3d
font_04_sfnt_off000157c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C4 3060 bytes
SHA-256: d50b4f3e8d689aec23873f9830eda83611340c406c631e4f94b75533542e8fe0

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