Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ec741e9e22b8d8…

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 08:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f1de47e4b95577cda939c71978f991e4 SHA-1: 3473339c469950da8d1f548fe30ed8b3e5344bca SHA-256: d5ec741e9e22b8d8af4f03b4174f23574bd8e695c8689d13599b26bb8e128472
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0cd0ba335bb3413765187a1442ea724c/salufezesasasiginif.pdf In PDF document text
    • http://queensparkview.com/image/upload/File/zoniduwogexex.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/danugiguruminanodazim.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/galibexojagipiveroman.pdfIn PDF document text
    • http://vipdiler.ru/files/file/6257435140.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/migotaguvotumetimupugetan.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/10791439582.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/3e96cfaafbc6c8dceca7c8690ee460c2/xawukasenodigezubetit.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/fedutemapu.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/xavez.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/pokuwe.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/gemawoxivifikatakoduvogim.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/fopaw.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/xudegutebuziwekuwujemolir.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/10f991be3c771325be74366685e0e60f/26438189121.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/30791452494.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/lejujipaxularajolukor.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/80821224861.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/saletavenivobejexisexori.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/jiruv.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/72616550386.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/fumodokar.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/84803155088.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/zagoj.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/85920190350.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/bakob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=el+jardin+de+bronce+pdfPDF 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_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 10600 bytes
SHA-256: 87b436b32c503f5dc776671dcca7f8721fac0235dfd95195b45ede5de1ad1ca9
font_01_sfnt_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 19304 bytes
SHA-256: 138a460a72aa6a732b8aaf9d32712b031f715457072411a985ca8efbbdd49d28
font_02_sfnt_off00012132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12132 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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