Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9149e9eb360e0c4…

MALICIOUS

PDF

105.0 KB Created: 2021-08-07 08:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f87c3a83d3ad36cba26d595d8bd29c6c SHA-1: 446b08ce473258b877890c4df27752e431e8a6b4 SHA-256: f9149e9eb360e0c45d26aef22232c8aa70cf8096ad24025636ad918b99e1d7d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that form a link farm, directing users to various external websites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging indicates malicious intent. The URLs likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

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://synerhu.ru/uplcv?utm_term=resumen+de+la+obra+el+principe+de+maquiavelo+pdf PDF link annotation
    • https://ccaquebec.com/userupload/files/vunidiz.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/68956587634.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210716062141.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ogrctr2c8a335naeemc0auda6o/53266662459.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/21404959900.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/3dcb470c600e87ddaa6a182f5029f7f2/xolefaduwe.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pfn43ta6j1m450d2v8t8t0rg01/59711205119.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/15596138115.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/daliw.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/vaweweboriragali.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/biwevusipumatas.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/kajit.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e3fd7c0c0---dunosefamonafomubed.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/67b56465a5058ff3b645df58606538d0/36608908825.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076fe15e3eed---besugetela.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fe6c62dae54---92509817594.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210616034634.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/reduwove.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3dc354ca1---gonobel.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160988677a504f---77775965553.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/29d7ee18659c36ce891306b8e0ca385d/4243566380.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/zerirefaguduzajuwotijoj.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/12b62f20bb60239ffb4ae8e56f0f4bc3/wumomazuwotevuwawunodemag.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_off0001341a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C31 11180 bytes
SHA-256: 9de4878cab8816139ca9f07759749c8a42b0963e860e29c3df903ad70a12515d
font_02_sfnt_off000165e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165E1 18132 bytes
SHA-256: 6f1962b0f3bf62b39c6e619c289c9d7c1b470d5b43d42c04039bd939c781b70b

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