Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fee11e5d84ed6a…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 20:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ab799499e05b91305c1bb2e20b659721 SHA-1: 1264ecd3ba9be2c5461430ae32e84a25f48a9e59 SHA-256: 70fee11e5d84ed6af60f14f7360e53d2632d03e8ada6d77b2bbebcde878b2219
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://www.agcontraincendios.es/ckfinder/userfiles/files/lobagoxatuto.pdf In PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/kopegikemorawonokuwojado.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/14662800448.pdfIn PDF document text
    • http://salkim.com/userfiles/file/mokejudivoledivoka.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607002b2aa50c---wanugesijoviwovewifen.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/88645082666.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/16143215543.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ko9jrr9qqs5vb78agh93m64b8v/46265695197.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/42846e78befb6e7d50923bcdea70e62b/tejororukutamekagije.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/5990330321.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081714e8b65a---32421412729.pdfIn PDF document text
    • http://physiotherapy-warwickshire.com/user_file/file/8636358247.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2803913d0---34549289252.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/33894308605.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/sutebukon.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/45706250854.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/zoluji.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd39f0368---26675824779.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/kupureferelefulelalenufiv.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/nunidaduwurizopos.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/39b72512f91e51e3ff6cda0470086f86/74516078419.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/feb06936bc156dfa4e87fbd7a395e766/zavosuzesedidenijari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=don%27t+call+me+ishmael+full+book+pdfPDF 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_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 11152 bytes
SHA-256: afd57021149d9cb7b46c847c87e222ddc0516def5723a4f2f4014166d47e616b
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 18032 bytes
SHA-256: 8157e853281c2c3e7c2abe8ac7a166849cd2bca4cec932b18616b7210ed21694
font_02_sfnt_off000123aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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