Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef0cf12d9668c5b…

MALICIOUS

PDF

84.2 KB Created: 2021-08-20 22:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d264f296d5651ec49460e79df1349ed8 SHA-1: 51e94b35503d295fb4724810ff724840915eaf73 SHA-256: 2ef0cf12d9668c5bd8591a2d0f0d9a0f2c32347ab4e5dd6c3e69b98fd7d0052d
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV and an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable domains, which is a common tactic for phishing or distributing further malicious content. The presence of multiple links to compromised WordPress uploads and disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.malagatour.es/ckfinder/userfiles/files/puxeboxeresumebub.pdf In PDF document text
    • http://adria-ex.com/images/blog//file/totajeku.pdfIn PDF document text
    • https://dietacud.eu/upload/file/vagakomesorum.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85ddba4b5---48848851956.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee82b73557f---52945165796.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1622b85bf2---kumuvedijoduti.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d27be001d---papudolegonolaj.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/suganenamok.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/65129251109.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608870da02ed8---9950821536.pdfIn PDF document text
    • http://recrute.fr/files/files/10058506384.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/54636343540.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3583fb11a254a44133a311315debb71f/vimiluninopeletuwajovipur.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/63750537909.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/69613653224.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a01e0976bf---63714592790.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/wodogigariwibawada.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119904126004---tesejumitemafi.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/lamafibaparixozujewuni.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/nibitolipebu.pdfIn PDF document text
    • http://healingpawswisconsin.org/clients/a/a9/a991db820639e3552774ed9a746c1e3b/File/datalipusorora.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/jopeloliwusujimilute.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/vavopofepugebuzaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=los+reyes+malditos+coleccion+completaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 18256 bytes
SHA-256: a77f6bf436a54a07644a6696b01830578d301493da9e5d54c6838bb29fd407c5
font_02_sfnt_off000111fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 10744 bytes
SHA-256: 08c6c4dfba2d45e6c01061052aefe1f34f1c04836d4a94454637d6079aa90b88
font_03_sfnt_off00012aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAA 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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