Malicious PDF — malware analysis report

Static analysis result for SHA-256 b148020fd4cd064b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 03:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ddf4d8be3cad537e18522a5b8bdb5ce3 SHA-1: 493d3a3afc5c813d9e4b6854b67795e21c12a486 SHA-256: b148020fd4cd064b57c7dfc86fe7cef6ed9948583fa7b35688ba8fca6fb68e6f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially compromised or malicious domains, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mangalargalux.com.br/ckfinder/userfiles/files/48163444146.pdf In PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/90670105471.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/sesojobefozaxuvosevitovin.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/doxakuvulotavotifegaki.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/fuluxomolop.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/sedipozuwuguvakavo.pdfIn PDF document text
    • http://zaiger.ru/img/file/69610188844.pdfIn PDF document text
    • https://mallenmediations.com/mallenmediations/images/userfiles/file/73362119035.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/piwof.pdfIn PDF document text
    • http://spharma.ua/files/file/pofozozelapigivi.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/mujudadakuzoka.pdfIn PDF document text
    • https://insp.biz/img/file/paxoxotizuvuvufojowasivek.pdfIn PDF document text
    • http://peoplefoster.com/pliki/63376471628.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/morori.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/towewekevapekuw.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/79939897132.pdfIn PDF document text
    • http://fitviewer.de/files/file/tupuvibipozedisatogavig.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/vijeronesofasosubo.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/66477871395.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/gelagumevil.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/pimupumeg.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/94112320407.pdfIn PDF document text
    • https://bselink.com/userfiles/file/41044346167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=plants+vs+zombies+free+pcPDF 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_off0000d8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 10908 bytes
SHA-256: c32bbba4466b902d244b0d25b32b21855f584f426a29adc9ba079df924e2b1e5
font_02_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 17736 bytes
SHA-256: 6222b0254004d2cdeb2aa8260e4daed7270fb5f52d9d82ab18ef37e512921628

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