Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0a2ea1428c980e…

MALICIOUS

PDF

93.9 KB Created: 2021-09-17 08:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 495ab69da7d97b0da4959b4a3901f492 SHA-1: d6b8c44ef8877080fc983b29c385731889f62853 SHA-256: 2a0a2ea1428c980eb6f1d2785c132020cd77315879584b79439965bfc5e40dd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. This pattern suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pixomot.ru/uplcv?utm_term=how+to+turn+off+headphone+controls+android PDF link annotation
    • https://fluffy-chins.com/images/file/votikalele.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132fb08052e5---25011470879.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4eb23d77375bb2e277c1f4b40da10349/loxiwodovosetoj.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/wamuferepoj.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/86050271912.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/60084251839.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/mexebibibanetedobosuzefa.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/7e48d8afff95fc09c881c494264bafd0/jepadunizib.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/33386961071.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/53874173955.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/maxodokedupa.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/vigexazubugukexava.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/9424748797.pdfIn PDF document text
    • https://businesslife.com/content/files/22527255868.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-06/images/files/72259001438.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/venegido.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/marudodameladuwise.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/sapebuzuxi.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/bawinib.pdfIn PDF document text
    • http://cbstav.cz/file/19470476295.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/nujixebidexakulazali.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/beselizitoluvowemezek.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd251466bd---10948885894.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/fuluveveguwuzamurutav.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_off00010a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A03 18088 bytes
SHA-256: f40c6cf9e36d4114350f8218b776ddd17431d8861c723ea7fb6e2d2ee106a7c0
font_01_sfnt_off00013908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 10892 bytes
SHA-256: 75d49f036deda2ef5067c757c86bc8eda8a9a9f4eee98290429517ab4447c4e1
font_02_sfnt_off00015229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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