Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ab7b5f6c9eb522…

MALICIOUS

PDF

89.3 KB Created: 2021-09-02 03:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 778a51c129dd3e3fdef0e7871506b1c1 SHA-1: 6f9e4ffabe7c1c29e62d02e33b34d81565ec66d1 SHA-256: 00ab7b5f6c9eb522748700fe9969d83d61264a364834944bc100552ca5f65d8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to potentially compromised domains and disposable hosting, indicating a phishing or malware distribution attempt. The embedded JavaScript stream, combined with the link farm heuristic, suggests the document is designed to lure users to malicious sites. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://queure.ru/uplcv?utm_term=conveyance+deed+documents PDF link annotation
    • https://tomas-music.com/contents//files/2867386492.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/wuwas.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/13971082075.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/banumor.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611ba22539330---27214868739.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/jonefulufaluzidasekezigiv.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/woxopewosanesunik.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/33022771546.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/d9c44f3c4d5f4e0f19bbbd00c68a5420/darivunugomitufibiroj.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/e81852ddb1baa50cbd68c07bdb7727e3/nolusaj.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/pavobetikukewewenulix.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/99703354241.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/79700753165.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e50bf64af7---ronujesukiruvibedizeti.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb53f210883---87104872006.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/55f4ce43cf914cef59ad7ba5d2f02cfd/bituweputane.pdfIn PDF document text
    • https://bdcomunicazione.it/file/puxikaxodipubafudovixe.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/bixafubimis.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/lezemuwidikaru.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/h19ea3p39nbms14f0ipa6e7g8u/22507068930.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/kubepalugujab.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee15bba8eb---lejofeludegidud.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/81162072856.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/xebogopag.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/68247334317.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_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 17828 bytes
SHA-256: e66fabf13822d6ca614a5b85988e2742b24b611f9b4f44dec266c01a2d1f6f25
font_01_sfnt_off000126eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EB 10604 bytes
SHA-256: 95539d4bc76cb0427a7a8dc001c738f0a106023955fd87b742be1a5eeb65da87
font_02_sfnt_off00013f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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