Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d4b47e75bb0a32…

MALICIOUS

PDF

95.3 KB Created: 2021-08-03 09:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5943bd9451612b2f507ad95f84f8101e SHA-1: cb1a294baf908c036390889d3fed370ae84b2fc6 SHA-256: 67d4b47e75bb0a32855a1f9db406cf11df4e86521763d0f9dc1ee209ff334b2c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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://medvor.ru/uplcv?utm_term=champions+league+2020+calendario+juventus PDF link annotation
    • https://zemiigori.com/uploads/file/94866027448.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/sujogukexikegirum.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/58645396179.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/3718286884.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/34303021544.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5f5857eff61a1584c8c1858a8fc6c979/zitepowedagiwonogoro.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/34512438200.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607472734c1a0---wajadigupawukalininulop.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/doxakejuluwawufuboxu.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/ponamimigavufedaxapexus.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xararatonufab.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/bebekodokimosevobufur.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607e04fd70e4c---zofiwovo.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/41059477920.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/zarubewijis.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074186b4374d---32067614741.pdfIn PDF document text
    • http://terminsk.by/pics/files/71133829848.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_off0001078e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA5 11528 bytes
SHA-256: a71c93acc75776443d12114f0b011627cbd3207d73b89d58c9d1d81fd9b8c192
font_02_sfnt_off00013a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A99 21408 bytes
SHA-256: 09420376ccd1b5b447628b50b0e13f4bc6112be7669f68946b400edfb9c4e8db

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