Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fd614e7dee9343…

MALICIOUS

PDF

91.7 KB Created: 2021-09-01 18:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6ffa555501f00b929b398bb91a70887 SHA-1: 42362f291f12adf4e6b4d01ac5c66a0c35ebc08c SHA-256: 99fd614e7dee93439996856f7abc3e6f5b5b95b263840e6fa7f2d91f7b100475
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The primary attack pattern involves directing users to external, potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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=blast+protection+or+projectile+protection PDF link annotation
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/gnkjfeqcv5lv64e81b50eqrck7/dobirililorezilopuxus.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/59929760206.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/winurejanij.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/dd663e8064500c41ac1390c667f3276a/vidadadigipujemetiw.pdfIn PDF document text
    • http://svx.su/ffile/file/nawuf.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/66115966352.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c0bf2a01---50443005529.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89d06396a---45613155857.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075c6803a4fa---mekopikemuwimupopumero.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/134251826.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/kn2ckl4mu975qpopsis0vdma0j/morumusubunusuroj.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/zinosa.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/56cbb1cc2c51474895382ba3fc5b17b1/pazuxunaxixudonavujo.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/cc361e35d50093bad63d66c040e52a18/tijixidovebisagivig.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/nizusa.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/werajewojaxipuw.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/98727ffe91cdee84798685fa76cfd115/dometituzawiworap.pdfIn PDF document text
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/38398644552.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/827873990.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60149e39d1---54946777174.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/telamalixusux.pdfIn PDF document text
    • https://raljob.com/userfiles/file/dexenop.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/905b7d2f84a9cd451205a5137bdf4f91/razabisajexamugeguserifun.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b91e62a7215---bifaxijelonojozunefizolus.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_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 17684 bytes
SHA-256: b1c5a31eff140c258424115a481d4f371f341759c7996b141f130a7947cb5eff
font_01_sfnt_off000130a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C0 10548 bytes
SHA-256: 0790f4a362ec9f88ec1cbaf35e257ee8d2e4fc6ccc8df0fc186baf837e24967a

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