Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ee2ffd3cafa6bc…

MALICIOUS

PDF

76.8 KB Created: 2021-09-06 08:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cb14f5accc1f8e255cef0689f86c734b SHA-1: b635af76f98023dd2ea43e3357f2d6359a9fa876 SHA-256: 97ee2ffd3cafa6bce43cc53405cc5283b6f8bc13cf4edd542807b247964ea66b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f26486bc9a---nubagunedovowulizojut.pdf In PDF document text
    • http://belgium-ex.com/images/blog//file/16550812438.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/rexirakapu.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/70568326231.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/lezugofomaxukirobo.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210521030929.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/83207967127.pdfIn PDF document text
    • https://kristinanamaste.eu/files/rofavenaturonanoka.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/89492099496.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160705abd43d57---83102842725.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/9b0188f1f90da8594b2151b76da6c770/rapigifiputemokisem.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/62968772597.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/48325243546.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/gujovisajarene.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/6dfea063452b86ff79501905f2aadfc3/26269515581.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/73990731071.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/3364913378.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/i48qaem2r20l9tjq52kjrqc3sj/78250056369.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/nodonoba.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ec010267399bc284540a5dfb556292e8/58116923751.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/dagaxujiza.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/70385839444.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/seresekane.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/negodogudexavesegoparular.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/webogoviwonuk.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613260dbc682b---vuvefol.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/233004d345214b7553c970965f5829e3/gizapejilegubozes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=airdots+pro+manualPDF link annotation
    • 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_off0000c7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BE 10500 bytes
SHA-256: d1a2544f7ced490ad1c3e7ba3f49afdaef24dc655dabe82628ec9ba18c9ab026
font_01_sfnt_off0000df90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A2 17100 bytes
SHA-256: 06fd8bc31709490f6f8a00ab797bfe7b780aecd382feb1e9636a974d56f80b01

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