Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f440b8d0e2059a0…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 12:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2d110c99be6aeeb5ff07cac0851343c6 SHA-1: cd0f3822fe8a51bce19f560cd3e723b7c40a2aee SHA-256: 2f440b8d0e2059a04577af568c93bfbd9e4e43cef98163d73c9dbdb797b1c240
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://4998horo.gmmwireless.com/contents/files/16300552193.pdf In PDF document text
    • http://kiuanai.com/userfiles/file/ruwujifanopiju.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/12932649123.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/14191792409.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/fuvopitepuja.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/suweliboziduwedu.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/zaguro.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/3gq3s0v01e4mokefqbr1pvl224/48358308474.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/siwagameginikawotoko.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/45627330968.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09dd71c4f9---2566035534.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3947f5463c---95196904550.pdfIn PDF document text
    • http://absigorta.come/file/95314445217.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/bebujuluduf.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/76781531077.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021071713065352.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092287c0fe46---17674751164.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/38602143574.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f85d28bf0fa---92080356822.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rubok.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/37071493408.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/rejesidimosezenesutev.pdfIn PDF document text
    • http://klaaswester.nl/img/file/71862996185.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/55451217609.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/kulexenexejewuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=acido+folico+embarazo+pdfPDF 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_off0000bbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E9 10592 bytes
SHA-256: 9c61ed46fed006aee7e99192a3af3b4176f57646b18b81c27b83c972d9bd877a
font_02_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 18432 bytes
SHA-256: d33495f178ea048a3b94a51cdfbf2ec89a853539d11ab1b959726d55b88340a6

Open this report in the interactive analyzer, or submit your own file for analysis.