Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83cb49585d59cd5…

MALICIOUS

PDF

89.2 KB Created: 2021-09-02 02:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cdb867c04b81502e3922b54ca6887bb6 SHA-1: 63dd5e47261f6ae45b0f7900690a439af366d068 SHA-256: e83cb49585d59cd593d1a211029d5065454be204e41d1cd1125fffa7ed02ea2f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs, such as http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847947f4100---45097051118.pdf, are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847947f4100---45097051118.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/6rh36b7e3jpbtbgeiebkfcda00/62888524452.pdfIn PDF document text
    • http://gerocuki.hu/user/file/folirovifavexujajufiwirit.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/85984317306.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/dovomadamoxake.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/kogepixufomalip.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/28650323695.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/2v0ugvsmje9v9ktd31bgj1khd6/kunonelaw.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c477c142882---wivabat.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/tabuwavaf.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/4400850696.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/71b71a57192c78ea3b493fbb2d148a5c/mumiziveduvudulaloviwomat.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607d593b58c89---nivigutelo.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/zodizutag.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/ranuropapirunebot.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/kufed.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/f9e12pbos5652mtb8jaie91kvm/jojudubekomurosiluf.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f3eca1c902e---diboligelegupikaxovepinu.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/zorejirexeninejexas.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b415227f863---somavefuluranakut.pdfIn PDF document text
    • http://snft.ro/media/file/45107591069.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/2694d06bf40c3fcc3be131fda3ac94f6/84068133631.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/xibumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=creature+3d+full+movie+download+filmywapPDF 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_off0000f6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AD 11060 bytes
SHA-256: 7f7f605b671e251b172e467f9115a8e06c66a44153a7ba2416a0006299299185
font_01_sfnt_off00011082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11082 18000 bytes
SHA-256: d22b77ca7dbd00e1c335f849b7d40777ff529f6aaf7a804aa3c2dff51a2232bc
font_02_sfnt_off00013f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1