Malicious PDF — malware analysis report

Static analysis result for SHA-256 944f6b15664c04bb…

MALICIOUS

PDF

90.2 KB Created: 2021-08-15 08:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be0894befde8beaa95325f85f05a321f SHA-1: 3f5aaf0cb9f4a6890893f7fda86b16e8fea55b75 SHA-256: 944f6b15664c04bbcf7254e5f13ddfa0cb6c25681577d24a276cdfd6031e9f16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to compromised WordPress sites and disposable hosting. These links likely serve as redirects to phishing pages or malware download sites. No scripts were extracted, but the presence of numerous external URIs suggests an attempt to lure the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/uplcv?utm_term=daughter+of+the+siren+queen+epub+vk PDF link annotation
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a254d11dbd---titow.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/mf7c4k2h890ehe83k6646as82d/gafaguf.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/vqpe4665iqk6m8gdojnai22rmp/weladirufoxigo.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/17325138888.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/72025685347.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b24e4b14160---kolawirafuvelukofoneridi.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607957f5317ad---zojatuvupox.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3067b8b64c---18634603899.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/mexidolopomepeju.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/fdd3b7d5f613d2ef3680137e21260286/dujudozegafuj.pdfIn PDF document text
    • http://hhcreunion.com/clients/4/43/43f38dc94a4d709fe78decf5bd9d7370/File/duvuvopolizekifozazo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/75b1ea7431f638fa4519bddc898d143a/xepunusifadaweb.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/zisetunumov.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/36381883845.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/situdirelafowotu.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/71731024892.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/47c4lq7pqm576i4j5lkrhrtlu0/23247268719.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/lebaruwo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/r4tqf53u70dopbkjeh7e0isoo7/zuxokimatat.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/voperexajizosolobab.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/23909911305.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/fasomi.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/92f7648be435f935c88d8f649c8d35ba/85512081389.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/38420172707.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_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 17004 bytes
SHA-256: 0ad92a0395fc89eed0d8c06d85967801c17cfdcd26a34fedafcc07d4981091b4
font_01_sfnt_off0001274b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F62 11136 bytes
SHA-256: 552fa594935e88d98e51844bb8f7b4013ede3c89d61bc5b781e4a1c8e9a21ff0

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