Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0206a4c3288564…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 18:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1118b2012ec1d42a2e2acd9fea574c04 SHA-1: 7784348c250972b3690d993884c709914e6a7434 SHA-256: 2d0206a4c3288564721ff9408f077c12578c6e98c7373b9822df6e464276906c
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple external URIs and the overall structure suggest it's part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161419f1aecb9c---gudeketobopesudu.pdf In PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/892e0c30d495275a8c19d2c0ed73e746/76210771784.pdfIn PDF document text
    • http://allier-genealogie.org/File:/38024338330.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/gufopikiwufesunafedig.pdfIn PDF document text
    • https://braus.uz/images/shared/file/rewesanef.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/gavogewezigetabesop.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16140866c57075---jefewefivubimo.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/fc1sunir646jtdunof5g43eja8/giravewolapatiwipet.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/92948672455.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/fevawogubixewuguxafufepov.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/kawifuxeresejuxesusu.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/jilinifexixutopunexodujak.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/venokewuj.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/pivesukirizusojenakufuxa.pdfIn PDF document text
    • http://juha.be/_files/file/41859198703.pdfIn PDF document text
    • http://gapp.fr/medias/files/dozupirikuvimopali.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/dutatadubajidugoguji.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/56553016733.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/43113858197.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140091e6e571---68530920293.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9cc623693---67469468286.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/34260415843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dead+target+game+download+hackPDF 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_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 10736 bytes
SHA-256: d93c57a85608f535de0a9ddfd88d0d9d5306b694a8fa22f8d03512c0efbad100
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 18252 bytes
SHA-256: 5b2874544ef3fc42ca526df85b5f2b0665c703fb09be7e9f863455eb5f1e39a1

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