Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ba09ae531ba49a…

MALICIOUS

PDF

64.0 KB Created: 2021-08-20 13:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 84fc8199366068092e9810234924b2ae SHA-1: 47334e1719f7a649573c990df63626a987360ccb SHA-256: 22ba09ae531ba49ac749bdfaf6866593de1da7dcbacabc70d096923e240f7e41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://247christianity.org/fckeditor/userfiles/file/847102635791626859590.pdf In PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7822916ef---sipazekol.pdfIn PDF document text
    • https://schmitz.cz/res/file/kakivasawiresefidem.pdfIn PDF document text
    • http://statenbracy.com/clients/d/d3/d362857cea7b6c304c7898dd6c6993b3/File/88735704118.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/minoxegedenikabetixomikoz.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/rezifugevalewolofafeja.pdfIn PDF document text
    • http://essuances.com/ckfinder/userfiles/files/damobugoduzepa.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/xuxagenegekulanovinid.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dac2fccd6490fc02bdfa0947c1148758/jekifosozanilikevi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16105484fb0f74---43396245792.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/9746a6372cd729117ff54c926970fb5b/30276888841.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609845224c3fc---36514771165.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2092ceb771---29326169176.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3eeed8ec2d---71074008098.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/pogupigekironuwibu.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/dixunanos.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/zizosodofup.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/lenakadak.pdfIn PDF document text
    • http://sbairs.com/datas/files/jujorazorabifit.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d066fb4d35b---99877763822.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/65175444016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+cheat+hero+wars+super+stickman+defensePDF 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_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 16264 bytes
SHA-256: 82e3709391e9cea1230f66a0f6dbadc54eacd17a9539c5befcf4b3df3e142753

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