Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e001ae8c43be253…

MALICIOUS

PDF

68.9 KB Created: 2021-09-28 00:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c07a6d8f69fba1f075d55f25125d3027 SHA-1: b3402f7c952e09a4efceac87e4ce35e8128d963a SHA-256: 2e001ae8c43be2539681acef77b662bc0f2628ee75d96e0a379ba777dc4f9f84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which are hosted on compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'utm_term' parameter in one of the URLs indicates a potential phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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=among+us+apk+crack
    • https://grandiosieventinuziali.it/filesUploads/file/99230946818.pdf
    • http://devveb.net/userfiles/file/38584621467.pdf
    • https://marwaservicecenter.com/nbloom/fckuploads/file/23496680142.pdf
    • https://wonkingchina.com/d/files/tiloritej.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613838d539b5e---7688107869.pdf
    • http://cukorbetegshop.hu/files/17912174663.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210922193346.pdf
    • https://jagamimpi.info/contents/files/pisekikag.pdf
    • http://birizgardenhotel.com/userfiles/file/42858301295.pdf
    • https://korovin.org/site/img_ufiles/sexufikadowenabage.pdf
    • http://chizclean.ru/files/fck/file/nodajikivonutanawulogad.pdf
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/redavitilowadizavemu.pdf
    • https://www.patisserie-flechais.fr/ckfinder/userfiles/files/buzejitemepeletarokewobij.pdf
    • http://begues.mobi/userfiles/file/73072912438.pdf
    • https://nwdglobal.com/ckfinder/userfiles/files/23401837535.pdf
    • http://leoclubmarsala.it/userfiles/files/vegaxozukimotewun.pdf
    • http://bftt.marketsearching.com/upload/files/83754979275.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613282912ceff---11010717794.pdf
    • https://gornjastubica.hr/files/23099005233.pdf
    • http://dj-maily.com/uploads/pages/files/vorotadomibabawukilez.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143efea66b7e---rudojokuxoridodixezil.pdf
    • http://kovacsoltvaskerites.hu/images/file/wavuz.pdf
    • https://mabuksusu.com/contents/files/piberegigewetikugixezo.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_off0000af63.bin
9bdcf24c26993c8df57f1826fab6d3732519b01d92e41152aca894983a186f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF63 10524 bytes
font_01_sfnt_off0000c763.bin
ebc1262992eb1bb8dabfa743dac4ee5f85a11e9cab8a9a540bfc0aaa6f5d46a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC763 15440 bytes
font_02_sfnt_off0000ee96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 16792 bytes

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