Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63d9485c883189a…

MALICIOUS

PDF

73.4 KB Created: 2021-08-31 07:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 22f77d04c99177f0d0e6bd385e637a46 SHA-1: 7581c5739907661b6bec4281d35d7e843ba5016b SHA-256: e63d9485c883189a7c3e4ae21075dc91d73f7096cc31e9d543ec60b403e688cb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3117

Heuristics 5

  • 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
  • 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 http://hutergroup.de/userfiles/file/28863771235.pdf In PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/80074453260.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/37434513103.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf83c64c7---zodagawatorejokurogesuner.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/63705084756.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f3ae615a76f1dce2df4b41df349cf17/28228164179.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/11/files/rixusubuzomekolozumizona.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/tuwuxekatiwufapal.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/57758687105.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/ziwogujof.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/bisipowe.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d394b479a3---wojelajoz.pdfIn PDF document text
    • https://sharenkon.com/files/koxizabezinaxirafikazujir.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/62153778444.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/10a885c61f49cc10d9b71743865e2a25/xazunijotas.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/panuwobefumoralinoxu.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/16777849933.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/vaxevifotipedafutezuf.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dfb29117a---96602237418.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/cc2497497bce07317551b9867c0c200b/rotilamula.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/boreforozinopuvusanunofu.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/rimezuvirotuwokifabex.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/48796431291.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/papiteguxatekubinorikevo.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160de51feead99---mudixanurotesosiwoneti.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/kijaxanoxarovata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=circular+flow+of+income+in+two+sector+economy+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A6 11112 bytes
SHA-256: 8c0d7f483801fbbfb30ae3ba1be174d339d30207eb5d587e487eb6f4a5bca65a
font_01_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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