Malicious PDF — malware analysis report

Static analysis result for SHA-256 e092b4adc9306f6e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-10 10:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e7297444a45f5e49360d2a37cdfea83e SHA-1: a1c3dc02c3bb53ffe7abf98a427229b16acd105f SHA-256: e092b4adc9306f6e8563aeefd880403d819260cb5c098ef1b6948752e86706c8
154 Risk Score

Malware Insights

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

The PDF contains a link farm, with many URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous links suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7162

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://teedinmaesai.com/user_img/file/24497602292.pdf In PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/480969fb219a88e5267f524c55ab17f0/11565987279.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210903200154.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/muxaromewobatabizuw.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff2a5ddf6a---jafatavezosalifino.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/xamomabefikepuwibumuga.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/69202436127.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/54733973281.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/23981865010.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/1580241557.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/rudodizitij.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613543b05509d---2819348698.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/d36c6504fceeeea1dff27dab61aa9332/92055572867.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210907075456.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/rapas.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/58250c3467fb9ed29cf240a73d5de711/82703843814.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/5478875446.pdfIn PDF document text
    • http://chamdure.com/DATA/files/lelerozitadunib.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/balupuv.pdfIn PDF document text
    • http://cobmedia.hu/include/nomukikatevamubilorixix.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/3584238124.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/pagepojewepusixig.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134773548c74---88654093436.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/wuwavimaw.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/52677100047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=la+hija+del+apocalipsis+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_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 10500 bytes
SHA-256: 8361cb27c79c0e552b0433e01b0f085e3f2b4eb55c9d28c44c817719a73ffa11
font_01_sfnt_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 19900 bytes
SHA-256: 42bfcbd701002e4f63d9c36aa45acb33d79644edf17edbc5b50d8e61b16e663b