Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1507c299373d7c…

MALICIOUS

PDF

79.8 KB Created: 2021-09-19 23:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 348e7394141fd2b8634cb3a6300d7e29 SHA-1: c6599e0c1de5a7bf677a0f455e884f5709bbb8e8 SHA-256: 9c1507c299373d7ce93f6b5ab6b57736d2fa2f2265f1e22023a5ec14f3ebb797
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to link farms hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a primary mechanism for executing malicious actions, such as redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.deewanalarab.com/up_imgs/39913993666.pdf In PDF document text
    • http://e-cluny.cz/UserFiles/file/kigapidadasasu.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/nolaforul.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9596949624.pdfIn PDF document text
    • http://belean.pl/userfiles/file/48173189246.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/nufuxodativenobufiv.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/61304365068.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f7579c563---86363751655.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/12733245458.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/15964545305.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/bojudivabarenolig.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/rosinewexewebeweni.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16142238ab12de---36819695989.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/23744139533.pdfIn PDF document text
    • https://limadelimon.com/images/file/64853189545.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/xamujito.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/12351780235.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/rinazazigil.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/gisusugonejegoli.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/vodunidewivomerawurom.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161420faf8eb4b---33758162580.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bptfe5t4c6decc57ju66bk5j61/gaxabupesuziwufup.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/88874454951.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/muzuxinelif.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee77dd0809---jezibakoponumu.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/82907619993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=scan+qr+image+onlinePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD450 10528 bytes
SHA-256: dabf6355468dedc1a9af6e41bb153d9ec15d50ac08ecb2efa3fb0c7531fc2eac
font_01_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 17960 bytes
SHA-256: 9c91cc63272d3e05b45833264145c4139984bb39925e1bde6a4e2d554b52c468
font_02_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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