Malicious PDF — malware analysis report

Static analysis result for SHA-256 95eeb9988f7df8d3…

MALICIOUS

PDF

89.9 KB Created: 2021-07-02 22:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5a50b7af71bb1712d93d330d68f7e631 SHA-1: 58953fe55196a4a7582ade29b26a7fb19c422073 SHA-256: 95eeb9988f7df8d347693e897119c4cd16cbe18a6750bf0fa92eb0f154901385
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of compromised CMS upload links is a high-confidence indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9d0ef1d2f---95559198870.pdf In PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bfba0bbf719---30283153590.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/26012558812.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/rezowobijariputokelorotek.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/29110621218.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/81e8f16bec4bed23d46d2b53196aaa23/95822911946.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7d3d1dda3ce1241497b574f713d15afc/vazenubasofikajolaxem.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083de3e8e7d4---45848765921.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb4898fe1---51417081238.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/sanexowotugidaf.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3486940e19---nagesekarajid.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/b50cb84cb6db4157ce856e3d4066fd1e/rataturisiwibozaj.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/butebibivorixe.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/2bsiduva2bv90ircb4pchl9l0c/dabemabovanolapimu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cba6c14b47---34658949558.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/d9eb8acab201811e37f143d56659a6e0/44788529149.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e825e179b---70391382544.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acf80aa14c0---jawenepujog.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/nonurikirena.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16f2f19576---foginujuvevupewigamoz.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/47533425500.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/negoponididotokuvowe.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/a012c8be88e8808ff6a5e26cfbe434e4/rovuvipoxesavog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=directions+to+work+from+herePDF 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_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 17408 bytes
SHA-256: dd7e1414ee5a8fc4b6ad694ed245b0cecfa0e52c36d1c77802f32bfaa3dc6854
font_01_sfnt_off00012a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AE 10572 bytes
SHA-256: 8834dd6f4fdbcc8144ee09c3c2724dfeade60bcbfbdb49da0c4c793d210bc47b

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