Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de2ba2a4138383a…

MALICIOUS

PDF

77.9 KB Created: 2021-08-28 16:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 53cd605e5a869236e40c484ea838cf3d SHA-1: 240072860a78c15bb630daac9c8dd68226ed141d SHA-256: 6de2ba2a4138383a2867e30a817e8522d05a28f25a6268632bf7e6802a44df57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be redirecting users to external sites, potentially for phishing or to download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.mediagrand.hu//data/editorfile/83699531202.pdf In PDF document text
    • http://bisenzia.it/userfiles/files/jigusosiwaga.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/5292ce6f0dc08556fb7f26b696f9b28f/22268440532.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/jatagusijezuku.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2c4d1ee668a7f5fa7715c584c7017fe3/12400324842.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/a42ie7l9v06c906bsid7a19651/divufipejalata.pdfIn PDF document text
    • https://bnovum.hu/downloads/podenejubevuxa.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf58a4a73c---zolilisewugopusola.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/mukak.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/ledesiguxuwuvoxuzodadiku.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/ratozet.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/6f5bf596e4e502cb40983418b89cfb14/nuderinanufifu.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/wilipiweluja.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/1rp0frj3v7kaf7n0beuk7jnlgl/45654233136.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/kuwobokew.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/99806843246.pdfIn PDF document text
    • https://atlantidegattico.it/file/feladidife.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/88997878541.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1623547737.pdfIn PDF document text
    • https://huanghecables.com/d/files/76928391651.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608afbea06ce1---boderufofagenixixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=groodle+puppies+for+salePDF 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_off0000ce16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE16 17248 bytes
SHA-256: b527d6c641e0e269806663bf2d565b98d50e621b182b6e6ac1034332ba337b19
font_01_sfnt_off0000faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 10428 bytes
SHA-256: 57bd0d219695d3dbb1e7bb45182114e51427f1a37a8c320287ad91dd5bb3fb08
font_02_sfnt_off00011264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11264 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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