Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b9f7c82f411c19…

MALICIOUS

PDF

83.5 KB Created: 2021-10-04 21:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9e82bfa9bc87327d659c66fcf6a93c7c SHA-1: 7aaa12e213fd4c313e7d71435d20402e327aef76 SHA-256: f1b9f7c82f411c19e5c9f981fa5a3b2d33145ecce5497405b6356907473ab215
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, with high confidence. It contains a large number of embedded URLs, many of which point to disposable or unknown domains, indicating a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pnlcoach.com/misc2/file/ In PDF document text
    • https://drivetripper.com/userfiles2020/files/88090449032.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/nibaduniposazupew.pdfIn PDF document text
    • https://wrd13.com/force/file/22712338245.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210914042528.pdfIn PDF document text
    • http://muratay.nl/userfiles/file/39310383167.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/jarosofojov.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/95476737107.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/76707723233.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161384ba6aece7---furuselivi.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/6203882925.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/67023072166.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/lanodisebotedoj.pdfIn PDF document text
    • http://mextro.de/upload/files/lenenazabewuzaros.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/97356278616.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/zonofoma.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/dubol.pdfIn PDF document text
    • https://nyig.com/files/file/pokavotesadisuvo.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/surizureberiz.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/konovelefawakanusekoxez.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/jumut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=best+ever+minestrone+soupPDF 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_off0000df88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 18720 bytes
SHA-256: 2ce47630b9a55bc0cffe0ac1932506a07e3e600fc9284c35ddf24680c503892c
font_02_sfnt_off000128c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C1 10424 bytes
SHA-256: dead4fd6f54745c0170889acdbaa0bdb2549434d3d91f92ce89c422bf68af760

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