Malicious PDF — malware analysis report

Static analysis result for SHA-256 09776fe2f8069b0b…

MALICIOUS

PDF

171.8 KB Created: 2021-09-06 09:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56072c3cbd4c31f2a95ec9dc2b2cf1d6 SHA-1: f040787b63bd5ef380acecd50b5694714064e1d8 SHA-256: 09776fe2f8069b0b41afc9ba029515c4da5e7b5c02dbf1f5908e47350a077a12
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites and are structured as link farms. ClamAV identified this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous links to potentially malicious content suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9727

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://manilag.com/FileData/ckfinder/files/20210728_293CE464C328A0E3.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573dd7e812---zemozor.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/0d77712b0277c98c291a67b3ecc3d065/59338176257.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/7883194666463239a4fa56d6dad433f3/minejivuja.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a4361ee24---julorizu.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8b5398f4---87553974108.pdf
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/legovikekepat.pdf
    • http://angelcabrera.com/FCKfiles/file/gobawakore.pdf
    • https://gikguamerica.com/userfiles/file/jisorefapadapiguponipu.pdf
    • https://bcbc3399.com/upload/files/judep.pdf
    • http://openendrep.com/userfiles/files/jabofamuvorira.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16120794b7ff23---37519471787.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/37751635526.pdf
    • http://myshopekerala.com/userfiles/file/zofamugexo.pdf
    • http://cattaneoarchitetti.it/userfiles/files/vidarijo.pdf
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/mikogimufupesiralejotu.pdf
    • http://www.minaakshimajumdar.com/fckimages/file/fijejeguwaperugizimi.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609013d93cf59---vetamareropobunedet.pdf
    • http://annassteen.com/ckfinder/userfiles/files/56970092144.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ff6344d33---18242858771.pdf
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/85470397950.pdf
    • http://pincailight.com/zk/UploadFile/file/2021062006434773499.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607aba159500f---kilor.pdf
    • https://guapa2.com/admin/fck/file/90670991629.pdf
    • http://vdtonline.vn/static/uploads/editor/files/jevomo.pdf
    • http://chongros.com/userData/board/file/83284645110.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=importance+of+ijma+in+islam+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002345b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2345B 16792 bytes
font_01_sfnt_off00024c72.bin
31162af9800fa91f73dbac1bba7e2c0e6c1c78da29c9df1db037da95c29bbadc
pdf-font-stream PDF embedded font (sfnt) at offset 0x24C72 10864 bytes
font_02_sfnt_off0002656d.bin
3d9024cf6edc6b86abe3875097afe3e048e1df7cfae86f8fb91f19fa8b1a7bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x2656D 22968 bytes