Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bcdea898a415d6…

MALICIOUS

PDF

86.9 KB Created: 2021-09-14 14:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 642466bf60ff339bd62b10660451d08a SHA-1: 1b153a26600c5187420bad5da30e797112c0b367 SHA-256: 96bcdea898a415d6624e31103a3a802ba1c4a5d1831739f9c8e46d26557ae2d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=the+best+graphics+game+for+android PDF link annotation
    • https://ajansnigde.com/resimler/files/59423333817.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/93744999405.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/foradisofosori.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0d9c20b9af8da6ea1fd849d7d94af7ee/fegatikisubewowanuf.pdfIn PDF document text
    • http://risme.vn/files/44536990869.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/32338093746.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01dd6acab---sagifi.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/goxegotefufovul.pdfIn PDF document text
    • http://beautydent.hu/editor_up/9894787670.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/15958641065.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/30197505803.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/61782861867.pdfIn PDF document text
    • http://tyextractor.com/d/files/rojawerolunil.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/zefeger.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331cb113227---39873200794.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/belogatina.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f3ef06d61---5710290447.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/gegomukamozitap.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/sadarinew.pdfIn PDF document text
    • https://media-get.com/userfiles/files/nepomev.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/38949682340.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/51207774282.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/kipibal.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/67480876713.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210911_025835.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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 16664 bytes
SHA-256: 75deb8c9d85d7a502fe2b5a2bda4deefb008286e326e028ab5fa20535d5a1f16
font_01_sfnt_off00011c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13438 11124 bytes
SHA-256: 7cac8da7f9a68140ef4dabecb5c81235724a55dc2d1ac21dadac4f118ac02d0a

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