Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8ef9eff85af0b5…

MALICIOUS

PDF

85.2 KB Created: 2021-09-17 03:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cd39651fe9586860190ad5a892373da9 SHA-1: ebbc8fb10954d1c95730fdf776c48af186fbedb6 SHA-256: 7a8ef9eff85af0b5cabc20a22b3dfdacfbc79d4443fb2f02a176a6e312554db8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the structure and heuristics point towards a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://gavionescodeinsa.com/userfiles/berujajetivofepuxedoba.pdf In PDF document text
    • http://china-guolin.com/filespath/files/20210910183722.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/34458103956.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331cb113227---39873200794.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/tegowenavatefewub.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/bisofa.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/dolat.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/83788233795.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/bimukutoli.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/24126256583.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/linisaf.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/bivikamoriketeno.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/logupixupefepuxininenuwam.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/lexedajebutebedekadimup.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/guwenilefuwalejekudarewom.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/kepalipajunesuxirini.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/vebisosowuri.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/25805002635.pdfIn PDF document text
    • http://df-2.de/images/daten/file/25970976171.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/036d6cef82c5a718df80c57be73068a1/babodasov.pdfIn PDF document text
    • https://intersat.lv/files/file/gonofoxosi.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/35591390020.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/kakukemawigujosaluvinamas.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/18740662052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=papa%27s+cupcakeria+free+download+for+androidPDF 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_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 10828 bytes
SHA-256: 7f10f923468a5199725c828bff3fab752716795dfbbb807d6182b17bfadf64e6
font_01_sfnt_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 22692 bytes
SHA-256: 847cbec2a915f272b738518c66dd93ce92583d6b5214895f8ed7ae7d51bda5ae
font_02_sfnt_off00012ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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