Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75681b2c804c78e…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 16:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3e310e33044e4191ba839907d469ae7f SHA-1: ebab26a8d8408601e7196e03692af50a17377111 SHA-256: c75681b2c804c78e562dd766984a769396495a11e9d81281afd3db49999dc255
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites, suggesting it's used to distribute malware or facilitate phishing. The presence of embedded URLs and the nature of the heuristics strongly suggest it's part of a phishing or malicious redirection campaign.

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 http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074907add088---8551933901.pdf In PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210504061732.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/60484e892dc97898b6a9514e368ac366/rixagoluve.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fabd10e8078---42277487023.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a839bf018e---nadakevatu.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/98816722580.pdfIn PDF document text
    • https://12tiga.com/contents//files/nobotamarutazake.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b885399550---31342247431.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd93c84b007---70907919604.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/91987866238.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/bosalifuwumepabedemizewe.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/wovof.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ec910c5e86a44336358b039e4a0bf5f6/22997928999.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cda334a028---65026272501.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/96113803628.pdfIn PDF document text
    • https://premium-house.uz/images/file/sulanetuzazenero.pdfIn PDF document text
    • http://altinay-law.com/images/file/zuxomexol.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/84785210379.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d219bdb6148---9218504514.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/a0dd157d29a91b39d3f123a18b6034e7/vetavepavukivo.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021082417181073499.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/tozedoxapalasowonafe.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/8i0ajk1epkaq83pfv419boi701/8850268231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=indemnification+legal+definitionPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD465 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 10500 bytes
SHA-256: e96ed8fdb079dfe70730062b05821f88afd1bd1b3e1b8f805ce19b06050c35e6
font_02_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 18228 bytes
SHA-256: 2a80d2cd5890b9eb6ac38426b89cabf5ff9e9b923ed9cb1bbfcde6d5ade93b3d

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