Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c63734ed143049…

MALICIOUS

PDF

73.0 KB Created: 2021-09-22 20:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 269616c83627626bf1d5ad557c84a33c SHA-1: 38dc06ae5ddb8871a5aa339bce38917b8beffd71 SHA-256: d5c63734ed1430492c752e63ba5b91e60e4eecfacb3dbeac8daf72f76413b497
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high heuristic score from ML and ClamAV indicates malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is part of a link farm designed to distribute malicious content. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://skogsformedling.se/bilder_umeny/File/44832929766.pdf In PDF document text
    • http://myflora888.com/ck_files/files/32925492814.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/mexodukuzazutabewebubimud.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/sanagerokonelofetisanan.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/33930108579.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/09a2956173f7e86eb5d4bb3386a41448/68548515921.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/duxuseveniwotuvepa.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210921045339.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/39137827464.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/xakifo.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/11764087371.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/zupolidubofogaxawugit.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/93405326539.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/mejexafifawenezevugir.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/juber.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495f884c1d8---zavujalapavilar.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/44710221552.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/zivexapafu.pdfIn PDF document text
    • http://shendaoguoji.com/data/attachment/file/fonanepunakotekubotab.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/87984218985.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/pididim.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/sofigidulira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=flute+note+fingeringsPDF 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_off0000b97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97C 10304 bytes
SHA-256: d32e3e3221e9ef6687af469d28fcd0a3970461db0724da613fa83e3079841d74
font_01_sfnt_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 17184 bytes
SHA-256: 2cca70818e67f963e02ccdf374978e646e8e17f1a74a9268c8d911dededd7849

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