Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a1d549825e022f…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 09:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 28b899b263488e0b89cc98d4d4e8ce47 SHA-1: a71544b4d84c673b6cafc8b21d232aa8e244aef2 SHA-256: b7a1d549825e022fa4561e6e89c506780c34eefdf11c102af8834c384139deea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Several embedded URLs point to suspicious domains, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/32900874973.pdf In PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/muduripejudedeno.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///sedapenelowu.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/mitifazevukelolutol.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/vobufulazebuzu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3j8p44llh2vpsj2slatcbkj286/22656305841.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/44353382562.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/fetalajasoduf.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/76709573937.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/49783581130.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/polexonev.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/vixefasikimejixixajufud.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/16187964532.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/tudagujefotewutekirofijeg.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/vevajugozegafa.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/kikatogamezifito.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/xaduxej.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/45401496097.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/doxetulekitigufemaxigut.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/27151618576.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/fakegubafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=vertical+bar+diagramPDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/85274960671.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_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 10432 bytes
SHA-256: 1ba1b38df58d1fd6aa85d70f5a61e5c730e38a7017f8292a1b532e27b5e22c28
font_01_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 16864 bytes
SHA-256: 0a2c79c5dbb1ccaff1c02ac8acd7973140e63064a20c28eeeae439ad36ccd3a9
font_02_sfnt_off000122b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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