Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb10ba092f71eab…

MALICIOUS

PDF

54.7 KB Created: 2021-09-30 11:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f1c6b446a16f7b436cba40565a8021b4 SHA-1: 2efb06561010d678b86259bd9e68cf023fac5ffa SHA-256: 7cb10ba092f71eab55a5cc71a776aa83f1711dc3547bb69d8ddefb167a85b334
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution scheme. The document's structure and heuristics suggest it's an image-based lure designed to trick users into clicking links. The embedded JavaScript likely facilitates the malicious redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8350

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 54 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=choices+apk+unlimited+diamonds+and+keys PDF link annotation
    • http://aarogyamedico.com/userfiles/file/66118354909.pdfIn PDF document text
    • http://engelholm.boj.se/uploads/userfiles/files/risukelisezaderujolupawuv.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091710163672.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/mobigekup.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/32117600167.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/webunuzar.pdfIn PDF document text
    • https://petikdaun.com/contents/files/febevokivitasamowaxoxidu.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/47701942925.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/wimuwojopunima.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/83524196997.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/76321438294.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/sagetebi.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/furodawasogenet.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/mukuderibilez.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/gevakefadunopaja.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/19994043609.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/355a84d47aba0456b1fecf02992797ab/zidolif.pdfIn PDF document text
    • https://paysecure.ro/ckfinder/userfiles/files/wulevene.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d0c9b5f0ea285bcd5f82ad000fdfb584/loxokigopikab.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f09acb6ad5---mawepix.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138c9a4e9697---91077245742.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b2aa6abbf---10284970727.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/desodiroseve.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/16602082436.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/36634497200.pdfIn PDF document text
    • 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_off0000b0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E3 11016 bytes
SHA-256: e1e65e7795f8535be33395b903968f043457e54fa0905e08b1de282a2179e100