Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e199b02eaf3a11…

MALICIOUS

PDF

117.9 KB Created: 2021-06-26 19:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b0801e1323e790608e319fb4a79cfead SHA-1: 7d3646a8e7d7404ee0257aae29791ecc6844f1a1 SHA-256: 51e199b02eaf3a11ce70892611809c4aa8629dff6415164b4e335b84eb6f5fc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristics and URLs suggest a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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://alkalacarservice.com/public_html/userfiles/file/796136421.pdf In PDF document text
    • https://pet-fashion.ro/mm/file/90695494263.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/juzanatelomumevenusoxud.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/9an14p792ido4kkoaoecujb1ai/bajalofegeburezuf.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/48220754354.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/p0l7lbsdplcai8888jvmmq0p2a/boviti.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/54377594023.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/83790073100.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/jetadosexupijinenori.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaa5a0ca35---80475603894.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa63c7f199---mujirujifinit.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3bc3af6bb---38412052128.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/jiwowosopogu.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/50734690880.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43c09d3181---xubifaxevonogegemokotepub.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/d56add4639991cf3cee0d080b85fa00d/52317152584.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/l7tltodlgqvjvpb3qn28lvf6k1/11929777294.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a733afbef50---webowikagebovusuxugizidu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/2l38v9n6tqpgumphrpp26ig2er/5280178813.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d26a1191e---4196766508.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3612c2bf5---mekogetizidejenugu.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c351be5ca---bazewazafepivumopadale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=rrb+group+d+physics+questionsPDF 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_off00016901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16901 11128 bytes
SHA-256: ccde70df2d04a05a3721ea77900cf384eeef0eb0a718ae35a5bde6b8ecf472d9
font_01_sfnt_off0001823e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1823E 18200 bytes
SHA-256: 77a8deca691cca98dd2f57dc1dfcce6139360274d8eca99d2b2efc49ccc3850f
font_02_sfnt_off0001b27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B27E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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