Malicious PDF — malware analysis report

Static analysis result for SHA-256 9470a641d03109fd…

MALICIOUS

PDF

71.3 KB Created: 2021-09-21 17:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b95ac676896282a528e6fe171f01eaee SHA-1: bef2278f833edb0680369d2a4a66527ca4c76d3d SHA-256: 9470a641d03109fd7d2ff48c8106891c5edfab7ddfbf94f07c67a231dae44fe9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://lammermoor.net/imagenes/file/tunixokowifar.pdf In PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/fudilumijuwexasumi.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/35298440723.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/lagawanujunezikofumo.pdfIn PDF document text
    • https://banghenails.com/upload/file/fojusofaw.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/71145593716.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/78120885527.pdfIn PDF document text
    • http://agmapure.com/upload/files/36405484534.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/maledijemagafeva.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e99b56cd7---xaxotutep.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/kegitezaxe.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/59149867619.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/35509281469.pdfIn PDF document text
    • http://juentai.com/userfiles/files/77283833014.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/30644165582.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/91487597078.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/70219059852.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/93071275345.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/12688803227.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/94737054129.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/barotugarotokokevuzabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cool+things+to+build+in+minecraft+creative+easyPDF 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_off0000b3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 11376 bytes
SHA-256: 62cb193c821c23d1df89cda254c432369cefd61f1bfb410cba317d88aca7e9db
font_01_sfnt_off0000ce56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 15976 bytes
SHA-256: 57d2b26180e108fd46096de9bfbc757a52604716e493c8914445e4cb3b01d9c8
font_02_sfnt_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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