Malicious PDF — malware analysis report

Static analysis result for SHA-256 845e5ae2119d7258…

MALICIOUS

PDF

77.6 KB Created: 2021-08-08 03:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0cd681a543b30817a1c78b2a52a98c3 SHA-1: 0bb68af8a9e3f886b1e28fabf29b731a3ee711a2 SHA-256: 845e5ae2119d7258908f7bb1dc1595358e020a668c3f5dee61bdd485d6173fcc
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alzubidi.com/userfiles/files/96447871569.pdf In PDF document text
    • http://metabolit-plus.ru/files/file/76385166718.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/32038274997.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb9b653482---konijav.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083fed2974d2---luwaliwar.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f562adc0db6---29652607830.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/55307393949.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7e413104---96091625455.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/d0a6e14345e47c69ec82d2bd6e3fa6ea/madariloxodebazurokubejal.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/nikuni.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/kugaluwukamuniforoj.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/veguj.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/65479459685.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/pht1o24i2lp4q7441gbibefsj6/jemirikevuxepidamuge.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/86546109615.pdfIn PDF document text
    • http://liyangah.com/Upload/file/ruledaxiradaxogidi.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e03538962e0---72391772390.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/bafemikekolerozofupobapok.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/koralejivato.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/80008438376.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/56618342665.pdfIn PDF document text
    • https://airbays.com/userfiles/file/vedowobenimepexusez.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/pevamimukomen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=medal+of+honor+warfighter+t%C3%BCrk%C3%A7e+yama+olmuyorPDF 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_off0000c534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC534 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 11408 bytes
SHA-256: fb2ee142b8c40f3df38a490d7743f58ca7a5af3e2bba9e7fd2e7a30f13bf88c5
font_02_sfnt_off0000f794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF794 18784 bytes
SHA-256: 05e0cd38bdc33879f371a984f304231f7d685f8ac7bfe7325d29e857de4d2da9

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