Malicious PDF — malware analysis report

Static analysis result for SHA-256 babada2c8fb19d49…

MALICIOUS

PDF

75.1 KB Created: 2021-03-24 08:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26babce695e60baadff188325fddfe88 SHA-1: ff367fd82c381e55df287ffaefe710797370d432 SHA-256: babada2c8fb19d49a459a0e3bb25a1867c0e05dc8dd7cc18a4574fc691dd6ca7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure for a 'Neverwinter professions guide'. No scripts were extracted, but the presence of numerous external URIs suggests the primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=neverwinter+professions+guide+mod+15
    • http://kibesamifi.getenjoyment.net/jasigudidoxuwezasopudan.pdf
    • http://nikaold.site/41306496420g5tz0.pdf
    • http://sentytld.online/tarot_for_dummiesvdwtx.pdf
    • http://jojonavakuxuf.iblogger.org/qu_significa_soar_que_se_te_caen_todos_los_dientes_de_la_boca.pdf
    • http://zotikarida.medianewsonline.com/automotive_chassis_engineering_barton.pdf
    • http://tewatag.medianewsonline.com/uses_of_enchantment_bruno_bettelheim.pdf
    • http://italysummer.fun/dixezuzawapo49dtj.pdf
    • http://sogejovep.mypressonline.com/achilles_tendinopathy_eccentric_exercises.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_11f46b706dc74a88bb60ed16d9507575.pdf?index=true
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c75c74d2c8b348daa73ae294911c8eec.pdf?index=true
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_219fb56bed7f4c3dbdf083d397e83225.pdf?index=true
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_11fc59acb36648bf87cfb8112486e543.pdf?index=true
    • https://eb7ae0bc-69c2-4833-8adb-ed465737bb77.filesusr.com/ugd/23493e_0c182788e4874f28aebad6205f85d21a.pdf?index=true
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_f111c58ab72c4b2aaaffc9687ea9c2e6.pdf?index=true
    • http://karuserewojax.epizy.com/71400348989.pdf
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_dd32933a8bc0498783494236612107bc.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ef.bin
3388bcf83f597add7fba12ad9eb51668d0d69504d547fc38509b2ad02ca61f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 5416 bytes
font_01_sfnt_off0000f873.bin
eaedb9f9c8638597cd26279b30e92fcb2a8a7582e1073c35afaa7a59fcca4971		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 11564 bytes

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