Malicious PDF — malware analysis report

Static analysis result for SHA-256 4469258a0c844536…

MALICIOUS

PDF

80.7 KB Created: 2021-09-19 19:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 345f85b6e122f38c4e855b45d5401a6a SHA-1: 2eafd13b21c4a169044b26916547ec786f2fe3bd SHA-256: 4469258a0c8445367cb482e0ca2adeff16146bbdf6816c3d9220e7f136aaa2a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many hosted on compromised or disposable domains. This suggests the document's primary purpose is to act as a lure, directing users to potentially malicious websites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=cheat+roblox+tower+of+hell PDF link annotation
    • http://st-ark.it/userfiles/files/52215846097.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/51840030800.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/rodajugabogoxozugafi.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/vofilod.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/928761390.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139059fd75cf---wepesawi.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/32986765450.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/728a772e05e1c13cdac03d5247622047/minokagirax.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/26159832492.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/vobilirifavozu.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///nugujidujinefiximakagefu.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/17405791416.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414dd08d1c6---47380439964.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202199203633404.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2622d505718be2acd9412ef4cd8541a9/mosuzavixa.pdfIn PDF document text
    • http://bndweb.nl/upload/files/64229391217.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/11726533178.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/9374567292.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/fobolewor.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/tuzogexikuluzadoves.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1822aaa96---90071452074.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161322d6b66885---54813154758.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/438537041.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_off0000d666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD666 18280 bytes
SHA-256: 430c84004f0d2d206d9ae8b12e0f9684f08858fdfbefb9aa2e21822236c6fdbb
font_01_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 10308 bytes
SHA-256: f684eaf347cee8a504e7a9c90ae8fba9ba4002f325fc94a53886a90d515d7e7d
font_02_sfnt_off00011d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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