Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3dad31474d78a8…

MALICIOUS

PDF

72.7 KB Created: 2021-10-02 08:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a3532ba12a8d4a57f90ea8ef5ef22803 SHA-1: 19bed96731a8d16a093d428a1a724b81d113b810 SHA-256: 2a3dad31474d78a8b586b4b54a85d91b1093b3872344cff176a515e5c918a1e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=secret+practices+of+the+sufi+freemasons+pdf PDF link annotation
    • http://jenan.com/ckfinder/userfiles/files/27598531904.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/tu3tg45c8104kg5rllm4tteof5/pafol.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/1141258259.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/nowabimekofapujonu.pdfIn PDF document text
    • http://proart.by/media/file/45846311213.pdfIn PDF document text
    • http://sinners-party.de/media/file/rodevebedare.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/61653895516.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614f5fe060985---65034869903.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/80118250549.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/febusidurijulelijekazu.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/13773143433.pdfIn PDF document text
    • http://peoplefoster.com/pliki/71073860602.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/34197118679.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/de2859bb949964ef9bf2dc8367ef6724/geririliwugavex.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/vofegofaxuxi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150dcc9873db---vibolemojuxerugofakaz.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/xalugotivusajofirisezif.pdfIn PDF document text
    • http://kaies.net/upfiles/file/namanisas.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/favubowade.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/raloxaduvisesola.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/52881622293.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/11840373836.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/fekokabujaxani.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613311cc42122---budisokudakikuf.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/309c29257cddd7fcba55de2fe0d861c2/tunefomulotovabemeta.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_off0000b6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F4 17196 bytes
SHA-256: 5d984f9928e28b69f5b20220238e95361fdad4952eee77ae9d7f8d36407f307c
font_01_sfnt_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 11016 bytes
SHA-256: ee83bbd1acab899a1f48c77dc883f5bf757af87614554ac4590f7e3c21f61418
font_02_sfnt_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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