Malicious PDF — malware analysis report

Static analysis result for SHA-256 74690107a8588282…

MALICIOUS

PDF

81.1 KB Created: 2021-09-16 20:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83c94de3a0e999b9303db0da2c0b17b0 SHA-1: a67e6d8ca89625886842544f5887779b44597c7a SHA-256: 74690107a85882826d093d344c7d8071357dbeeeb11ea392ee7e8087a678b625
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=how+to+clear+cache+on+apps+android
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16130ad2c23dca---95505620771.pdf
    • http://anpharma.net/upload/files/kivavizigututijikawam.pdf
    • http://kientrucnhacuagio.com/upload/files/gowes.pdf
    • https://rumahbaruku.com/contents/files/3488653615.pdf
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/36963256929.pdf
    • http://fotografieindex.nl/images/uploads/98941291791.pdf
    • http://chanhungcorp.com/images/uploads/files/18430837075.pdf
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/gokukibadado.pdf
    • http://domuran.pl/files/file/nozovibegajuxizap.pdf
    • http://bocghebinhduong.com/media/ftp/file/26864447645.pdf
    • http://files.ibiza-ferien.de/file/25199513242.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/gejelod.pdf
    • http://aktifbant.com/resimler/files/levejarujalo.pdf
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/13505706439.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/ae4d6a9cee32ec0226a8641cfa2bd5bc/dekukovowexujawefosiketas.pdf
    • http://terralis.net/catalogue_dynamique/file/bivejotinusikoxovuxor.pdf
    • https://mimpishiodua.com/contents/files/guzovopi.pdf
    • https://ilexgold.com/app/webroot/files/userfiles/files/notejebadetawujodidage.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/rs0k8u6rg93d3gm42u1br1kb0q/sixokawamanolar.pdf
    • http://chinhlytailieuluutru.com/media/ftp/file/96298269201.pdf
    • http://koreanhotpot.com/uploads/files/gedoxavo.pdf
    • https://angkorphotographyguide.com/userfiles/file/67413945494.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da57.bin
0d696526f9f911e1222b57408a383d2d1558590dc98132d05f55cbf76b3f56e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA57 10688 bytes
font_01_sfnt_off0000f2cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 16792 bytes
font_02_sfnt_off00010ade.bin
60aa838b358ca31b0cd92ff35010e6f8108227d34a882e0f2e19b4161d958cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADE 17084 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.