Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e522a0dd5ab4f99…

MALICIOUS

PDF

88.4 KB Created: 2021-07-27 19:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6b5bf6a7c2fb691b2b8819000d0e3252 SHA-1: 7add491c9eb4e9482e7f1479a6ba811c1c053ab7 SHA-256: 0e522a0dd5ab4f9955d816368330372169b257b09b1c7a938953e70c4d2447e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which are associated with compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ort168.com/upload//ckeditor/files/kepivufoduvujisejibijo.pdf In PDF document text
    • https://lesfeesdelhetre.fr/upload/files/99388543305.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74267a31f9---2080432484.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/16317302667.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5f5d55569---zukaripotebazudutupetukug.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c36bf143103---jezinilavuwelugonevazeb.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/c60337dc5f742501551e69449ba2a8d8/64052359012.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/d63o8gtb62ir0i5p9ustdt1rl3/38197755489.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e43cd55cd---rugaremonivoribefubigox.pdfIn PDF document text
    • http://tochalco.com/uploads/files/12128479117.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///pafefuwuwuxelozarob.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/meu2e4dgooi3oks05onneajq3u/wepos.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/65083197369.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/73384252497.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/kelasarerikimo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a93f5d3eb---62893395460.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/96026962256.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074852d7da2a---93478301189.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ee28f39618a---jesijor.pdfIn PDF document text
    • https://davaocarrental.com/images/file/91488927106.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/3987307043.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/80875666817.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdda2ed85a---20287824015.pdfIn PDF document text
    • https://armandofalconi.net/userfiles/file/gagepukazuliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=whatsapp+funny+videos+free+downloadPDF 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_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 17076 bytes
SHA-256: 73d80e2d9a31e9d7405ed88a039a3c69e0d029ebecb2b437787798a6e0ed441c
font_02_sfnt_off000139f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F7 10956 bytes
SHA-256: 149ef3c02c3042a1ba841c6f0e941b0e96590760f8739d6878f03b90637c964b