Malicious PDF — malware analysis report

Static analysis result for SHA-256 0060c16ae7edae5a…

MALICIOUS

PDF

85.0 KB Created: 2021-07-22 10:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 46a2a899ae5fcbe036fa4cd2f2277ec2 SHA-1: 2fee87a2a5d748d93732ff26d7f1f2407c905444 SHA-256: 0060c16ae7edae5ae5c8d603c6af8d094554e60dcb30d5d67b2a569bb0e50b30
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a570a42608e---38675262054.pdf In PDF document text
    • https://poolpoint.be/uploads/file/duzegewuxalopatiko.pdfIn PDF document text
    • http://alltechsro.cz/files/28834130772.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fefeeb4cdd---36258352054.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160db929bb0993---fobidexomazevosotadaj.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/zitolu.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/30073651829.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/70641459271.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/59285971065.pdfIn PDF document text
    • https://avenue102.com/uploads/file/50597164241.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/97ebe81a312234420613711bb8f48cbd/vubonasul.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/14917688951.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210516025820.pdfIn PDF document text
    • https://ivanamihic.com//files/kesedoxabapunad.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaa09d5b64---nuferixegojiweniluzuberu.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160770330df554---40662171348.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/93621649558.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b272fc20171---piridevapefif.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160dae31f302fc---86523016705.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/85038831674.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/j1d8qogqtmv9casgdho6aem717/mogone.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a8a90cb5---51289254847.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=find+equation+of+line+with+x+and+y+interceptsPDF 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_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 11244 bytes
SHA-256: ad532a783131afa750442f860dd63856a9d8b29b25152339e4a142b78fbff710
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 17348 bytes
SHA-256: 0df1b0bb68cd4cce978328b93cfdd39d244fed37e30be9d726e231edee11e61c
font_02_sfnt_off00012e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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