Malicious PDF — malware analysis report

Static analysis result for SHA-256 608701afb6cc781c…

MALICIOUS

PDF

71.1 KB Created: 2021-09-27 12:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7be8856a5da702dc6e2ea8b33aa03bb5 SHA-1: 21ff2b3db9d9d7361e837d2d319da272c9e8fc92 SHA-256: 608701afb6cc781cc6b7c00f52ecd99a87ac287ccc896945ee054573637e2923
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, directing users to download software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://ketchas.ru/uplcv?utm_term=windows+10+download+for+pc+64+bit+full+version PDF link annotation
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140e815a8404---47247123704.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/23830015644.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/13067905026.pdfIn PDF document text
    • https://cicimanis.com/contents/files/90549258797.pdfIn PDF document text
    • https://senfina.top/uploads/files/jisutusoditik.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/pebovoni.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/1405279828.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/zodipagutopir.pdfIn PDF document text
    • https://kildevangen.dk/files/88126039490.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/jawoxalizolobaw.pdfIn PDF document text
    • http://plncse.hu/php_data/file/zaxovo.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/lugevoju.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/gokamituxunuvudovusis.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/94414619707.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/13127053818.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/danezexupuxex.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/daxaposex.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/39297333670.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/70d8da3a943b3d1ce9edd11e7efeed0c/dikew.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/falupinedekufezoluv.pdfIn PDF document text
    • https://onlinendttraining.net/files/52951236453.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210920030106.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146ddac47387---zamowanugibupop.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210913035349.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f051a6f66---26157001467.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/76876497187.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_off0000b29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29A 11420 bytes
SHA-256: 7d72072fdc0c9d58a4f26b9183f0a8eae25f1f12e30a38445dbb3640a5c9b9b6
font_01_sfnt_off0000cd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD93 16032 bytes
SHA-256: 2a2786da0d0f729fa05ee83296b699b20a5064d461a36cf4e5477d1be4ce0d98
font_02_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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