Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea202e64a763900…

MALICIOUS

PDF

79.8 KB Created: 2021-08-01 13:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b38b075f1b58088d627de84bb3ea161e SHA-1: b3463c0ac22391509575c7dabebe95877c0bece9 SHA-256: cea202e64a763900d6245874fdd4b887c35923f643d198a114ad42ccc6764893
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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
  • 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.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7337a208---vowadezitizi.pdf In PDF document text
    • http://mamitobe.ru/files/file/malokirukamozerogorexinef.pdfIn PDF document text
    • http://ahhsclassof1980reunion.com/clients/e/eb/eb0bda5e83c72ae03ef0bdd1ae4752ba/File/35361787572.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/40983602173.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f496826e08---zikaxulujaweneg.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa53eae9520c974256cca8a0d8b333cb/9397029739.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/1861638028.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/gorofenogu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/da4f4e6d2c249abb6318f8c625f97bf7/95122450432.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/gukir.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/somexepojurozi.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c7cf4f5d1---bemebixobegaz.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/tirerutotibitinizatasomeg.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/54622668902.pdfIn PDF document text
    • http://lagrupacio.cat/file/vimetasapidipofiwanovu.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/japexaninupaximujes.pdfIn PDF document text
    • http://cokhisah.com/webroot/img/files/99182518256.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077254c9bb78---83632724675.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/edaa20784a5b3953bf0b2436b2b88ff6/79554426649.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/sdu29amk4buioqeeui3hfsapn4/25499192164.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/dodejavanavulokoviwajo.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/delolebezitibogogose.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160870858a1466---38639581409.pdfIn PDF document text
    • https://soechi.id/userfiles/file/nosenotede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=pandillas+guerra+y+paz+primera+temporada+capitulo+144PDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a9a92753c---43292053196.pdfIn PDF document text
    • 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_off0000d08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08D 18456 bytes
SHA-256: ee2dac72c2e7ee059bbcc027f58b724673e1ee17a739026283763d6fcebba4dc
font_01_sfnt_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 11264 bytes
SHA-256: ea34e8c458f7832ffce3d931619623de62bbcea515d14f78a2bcdc80721a8d76
font_02_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1