Malicious PDF — malware analysis report

Static analysis result for SHA-256 805a1b46e511ef19…

MALICIOUS

PDF

69.5 KB Created: 2021-09-11 02:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 16fe8202f9e6f5d88682b6c58f80f84b SHA-1: d793a673c2208a6fa475e2806e86c0d8943bd000 SHA-256: 805a1b46e511ef19c2dd1299298a473787ac3e7a42dad00afbe4833186b62575
172 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised CMS upload storage, suggesting it's designed to exploit vulnerabilities or trick users into downloading further payloads. The presence of a 'download button' lure reinforces the phishing or malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garagehayashi.com/js/upload/files/60625535183.pdf In PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/nujoxovezupux.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161384f1252fd3---23699531344.pdfIn PDF document text
    • http://goref.ru/files/file/wegikavagutixifupimujiva.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be01ca362d---pinujikol.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139052f6b1a1---99392324038.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/vefewesaxewewemomep.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/kinopobeterelu.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/82710097479.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/50849474424.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/14556820527.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/xakuxura.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/ripakejosojudiweke.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/77fe90e2886a9117d6655ce576c0be3e/mepafewezor.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/35510852624.pdfIn PDF document text
    • https://tekmaker.com/upload/files/97399462639.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/mabunegeguvat.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/10044303359.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/64222760993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=princess+of+persia+game+download+for+pcPDF 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_off0000ae63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC675 16304 bytes
SHA-256: 0ab1668df6192bbd5e666113d3a49e285abb4aa855efdfebc4bdd2295f386daa
font_02_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 10952 bytes
SHA-256: 0fed6ce0b7f44aa0acdc6b3366e74450b0fa942921f779e08dc54b00d5da3035

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