Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa95b23d7d578d9…

MALICIOUS

PDF

74.9 KB Created: 2021-09-13 15:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: efb8cc88cdc77646e268efeca6e621dd SHA-1: 86b9af515357b5da814c5ace328c9e3d853b3f48 SHA-256: 8fa95b23d7d578d983a2b3dd29488b6d5037e0bec07ff528ee8e74dc69cfe9fb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://smidgel.ru/uplcv?utm_term=pokemon+mega+emerald+gba+download PDF link annotation
    • http://dezmaster.com/userfiles/file/mutigizapes.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/gaxatot.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb7d914add---mifawitudofawewukiwesis.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/suvixinigaribox.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/11864572066.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/7040578564.pdfIn PDF document text
    • https://rotitelor.com/contents/files/reguzujudupusafajaruneman.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210902063209.pdfIn PDF document text
    • https://cubic.is/userfiles/file/84103296234.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/71181306454.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/dezus.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/85061371667.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/36893143594.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/xubesiduforofuzigori.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/parogokuponogaxodesivova.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/wigatitu.pdfIn PDF document text
    • http://erex.hu/upload/file/36218149503.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/gosuzuke.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613807dfdca29---vijowefelalu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4654f672f0d5f4684a26aff2e2ff0cb7/nubudavez.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/28276128182.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/11551838593.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161325b73c557a---64020075928.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/tabolelosumovopaw.pdfIn PDF document text
    • http://rs-entp.com/upload/file/54160888422.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/367247454cab6525aed73a3fbd3bd91b/38829161320.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_off0000bce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE9 18756 bytes
SHA-256: 6d70a4d39212b3a57e0b9c98ed542555d6f4e7bf2a2ab3e642f5a711d0db443d
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10642 10552 bytes
SHA-256: bb34fe803e5763a2bcc26075703e8c6b54af127c9aed73eb20bb650034547995