Malicious PDF — malware analysis report

Static analysis result for SHA-256 88483e105e362e9a…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 08:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34247cdd42661f81243074849650b082 SHA-1: 1b8eed88cba77835efb8ea090d26affe8c5b0607 SHA-256: 88483e105e362e9ad17e165ddb185743d1d8aaaba149e3d8898f36e40fda4b96
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, indicative of a phishing or malware distribution campaign. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple external URIs and compromised CMS upload links strongly suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7090

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://haohanlegend.com/Uploadfiles/files/lufatigosivoguduzejemip.pdf In PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/1606ee53873fdfc576bce1f3e1e92be4/megewisuzeke.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9eff71faf436495ad88eceeb2f3d9f08/82871590254.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/81340684955.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qu0kcvarlbme63hbnhufp57qq1/jazonejofebigomuk.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a324d165225---zokapitogefijogekexitari.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/7285470786.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b9f20dc5---pudawaweroxilakor.pdfIn PDF document text
    • http://asustainable.com/global/file/wojaxavizupejidobowuter.pdfIn PDF document text
    • http://coffee33.ru/archive/file/tavijokopukeweve.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608817f75f7ed---wasoxevipi.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/zozoreputotazi.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/mugexitovib.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/eae29dcc6c7e637a99c207ac45339e12/65326707518.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160873891e2bf8---69761709792.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/wekuwiver.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d4865d8e---93772997669.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/bejukikogorefe.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac506a8b637---90368401811.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/nalomewawakivefogilasipi.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/24512015519.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/solukuz.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/kekixoreniximawusajusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=airline+safety+management+system+manual+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 10916 bytes
SHA-256: 80be07130c3bed8c79410228e31635325e1533506edb8346c76a3ff81d7ead2f

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