Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2414b5e42a189b…

MALICIOUS

PDF

76.5 KB Created: 2021-08-02 14:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 722282916894c2504c71b9f9b7aaab46 SHA-1: e12076d0a2bfa1cdcf39ffa6c9e3991fa11f0d14 SHA-256: 2b2414b5e42a189b53d759a783dc0d55b2413e813004a2328b824dbc159c5b21
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 pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/82afd6796bd89d8e2d756b7b1ab8aaa7/tebape.pdf In PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6cc5e0c86---jevusevubotal.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/pdqhv115nuq3mamhe6e1tjjisl/jekiwuzipibasuf.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609893f868035---wuxasugetav.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/97442794403.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/fekuvukexezagewo.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16218765590634.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/tozimevomojetota.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2d77af56305daed8f76b364f1a842bfc/52644473468.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/4e8494fe5ff81da630894e98c0a80704/54981853751.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/36260311331.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f812c2d32261f3ca0d634cfc41c35f35/vejeviduwejuxebubixusolop.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3be76d1c5---lozidobikurifisizefil.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/67849363131.pdfIn PDF document text
    • http://elm3rad.comfile/5811031095.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/disapozaxinefirirerex.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/43775921748.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ec533ab35cd---xikerilodugavutix.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3fe911a91---vutupeburolulurotaxaruru.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa015634e3---27984679770.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/31480943038.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/wujijemawojivoxevav.pdfIn PDF document text
    • http://toyotalongbien.org/data/dulieu/files/86594018096.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/19322966484.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=best+offline+messaging+appPDF 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_off0000ca8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8F 15920 bytes
SHA-256: 5b1b62c332632a841cdb2f265866d42a25149ed31a970b36e0188eb6075da917
font_01_sfnt_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 10652 bytes
SHA-256: 0a58f56ba04bb90f4c0292ce7c72001905ac3d2adeb6095133db18606727a284
font_02_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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