Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb291dbc69847ee…

MALICIOUS

PDF

85.6 KB Created: 2021-07-18 15:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ce426f7852ac395a2ab9aea5035f514f SHA-1: 93639d2ec1bab24ffda2144f21ee3dbc3c7b5670 SHA-256: 5fb291dbc69847eec1af0bf99bf7e64943423acdab955c71a951031bbbce40ab
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a link farm and a social engineering lure to install browser updates. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery. The presence of multiple compromised CMS upload links further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa5ff759bf---zajakibupowawutevusa.pdf In PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a88feb6f8---49128621818.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/34016484516.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/98352453979.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a02cdb00e31---mabejimatifejogik.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/62996943508.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/1978612536.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/64797805390.pdfIn PDF document text
    • http://internationalbeautypageants.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/wunuwedawojurulizixi.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/42gik3s4hda9ephit91vvr7mh3/xujufurobadivowotad.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb3a83bbd---76100086104.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/13300425875.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/bdaf79fe06b26f067d5638b5247f9b67/6727527752.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb2403f528---naduvo.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8a19e1d9cc4c89cc975ab6d96056aa68/70817448740.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/sirubesegotazovelafowize.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c12af4b5196---39048681785.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jlki6io1ajkro25bgjhedop8h7/berimibunesebaganav.pdfIn PDF document text
    • http://willbramephotography.com/xapoxafujiluwavemar.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/luvazidimibemelorofu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f31a2f577f8c70d73937a00cd60f9120/83708231085.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/jifuxuk.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/30ea6c52decf5dfd4e121bb77c21fd65/79380058328.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/tovasim.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/mamevexipeb.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/nukexan.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/xesuvekanimaxapowek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=is+there+a+way+to+retrieve+a+word+document+that+was+not+savedPDF link annotation
    • 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_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 10904 bytes
SHA-256: 99b7f64923f923ff541d3e0224f7ba711cf99fa27f13f8203dd9155dcefd855e
font_01_sfnt_off000104e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 16728 bytes
SHA-256: 61767421ff69a043f7fb37c94137d984db115281e10315384b20a08948389d8e
font_02_sfnt_off00013087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.