Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4c47edb784420d…

MALICIOUS

PDF

94.0 KB Created: 2021-09-16 17:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bcb1fcd7ee13107176708b2baf44eb55 SHA-1: 02c61a22e0b9b043d8e5840d46235400bdf2bb20 SHA-256: 2d4c47edb784420de0a71ec61842bf95e3faf735751aefad2d1e289a72605038
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of URLs like 'https://oniceh.ru/uplcv?utm_term=windows+movie+maker+2016+classic' indicates a potential lure for users searching for software, which is then used to redirect them to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://oniceh.ru/uplcv?utm_term=windows+movie+maker+2016+classic PDF link annotation
    • http://studiotecnicomartani.eu/userfiles/files/juvejixuvuromedamuputigox.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/penizolubinanafovovul.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16138ebd2955fd---xigovanagumuzobumelop.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/rovuvaxonuwesopes.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/31467204018.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9sk87fvdkhhiph0743bo5kmj71/99755136642.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/54297210558.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/natufemol.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613e957a40c3f---43817112095.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407dba4d0ec---wumunobaruziselepanuzixiz.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/59941976600.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329034d1a05---98051118667.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ai7hbj2gh03la0975002tqhp36/xijewu.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/xupewozawinemoxeb.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c34a93c9d345354c3e23a7235dcf72ad/61649275950.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/gaxelopefuteg.pdfIn PDF document text
    • http://levotst.com/uploads/files/gokafenob.pdfIn PDF document text
    • http://yesfabric.com/images/upload/File/29080354000.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/77016744709.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/revimozepe.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/72968683488.pdfIn PDF document text
    • http://sdds.be/userfiles/file/89534357550.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/39956415487.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/pedivegezumesebefaka.pdfIn PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/41704334979.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 18404 bytes
SHA-256: 467b6fd2b73456c2daf179027c9c6bccefb2b905fb56d51591f6f47937f70f5a
font_01_sfnt_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 11132 bytes
SHA-256: 941d562e7dae692194dd5f07878cefb8886147a1684eca5f4d6bb74dd90c58d7
font_02_sfnt_off000123ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CA 17532 bytes
SHA-256: 2e56845fa9fffd5704e4cb1a55b0ffd351b59f37d9be29ba3e756d2865176c13
font_03_sfnt_off000151a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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