Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede1e7e9b8f486a1…

MALICIOUS

PDF

82.1 KB Created: 2021-09-11 21:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a41ba41125ea56a04f3cfb72a5f8fb0 SHA-1: 869f0691f63e3c8c9675ed120527a4e260d40b16 SHA-256: ede1e7e9b8f486a1185ae712078e5bf652a649d0aecd93f376b6f346e5aaa3a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which are on disposable domains, indicating a link farm likely used for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=hero+of+the+imperium+pdf PDF link annotation
    • https://speak82.com/_UploadFile/Images/file/xonul.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/75456106535.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/xitijawonajexej.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/bokulesobidawe.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/polareguwego.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/dirimin.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/25591597679.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32604452956.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/11830759114.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/70235219675.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/2774231828.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/74327864829.pdfIn PDF document text
    • http://capri.lt/userfiles/files/rusofa.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/76217676438.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3d44518e7---93570567186.pdfIn PDF document text
    • https://kaunas.cvzona.lt/resources/img/files/32171153607.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/4071343753.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/4745295546.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/ruputumesukevoxadopigas.pdfIn PDF document text
    • https://buyafranchise.org/files/files/vonilemugawiwog.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/8065574583.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/54855523966.pdfIn PDF document text
    • http://blueyee.com/upload/file/041204109639.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161375bf9ad020---22404720832.pdfIn PDF document text
    • https://bak.vn/upload/files/vadetipebewipakovamum.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_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 10376 bytes
SHA-256: ec834044c0348a6aa48e79ed0ef6c38d9c6815ed312c7c2a605a34bf544f473b
font_02_sfnt_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 19196 bytes
SHA-256: 8765b6e520734517f7754f56e529615fa2ba6738218a7ebd6b71e54ebf8377e9