Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b36fce8b6f6048e…

MALICIOUS

PDF

85.3 KB Created: 2021-09-16 02:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3ffdca72c17a15ca3f31da5eb7d8b2a2 SHA-1: 0cbff91a3cba35805f9645c1ecadf17a516bcfcd SHA-256: 4b36fce8b6f6048e4189e25b6f4fc7ed475a600a2c5f5c8d2b152f7a9d3379a4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://allytemp.ru/uplcv?utm_term=full+control+android+phone+from+pc PDF link annotation
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/70110863375.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/2190667399.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/kiroxenikilunapig.pdfIn PDF document text
    • http://decorstore.eu/upload/file/1478394821.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/wodesejotovoneraxesop.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/purubujepeludofunog.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/guvovirapi.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/39353519050.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/82439601638.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161427e837478a---41782153638.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/50093058245.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/wotizejafoxofipasujikef.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210913103616.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bada2ef122---fupet.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/xetisaxiv.pdfIn PDF document text
    • http://oasishs.com/uploads/files/20210907_192928.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/waxezosoxot.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1631288814.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/29391089337.pdfIn PDF document text
    • http://test-immo.com/file/narujaxun.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/60854202238.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/mironukosenajojovinija.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/juladafimexogi.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_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 17900 bytes
SHA-256: 8d71188c8a31f53724a1d1c73a0ce598835656be9fe96e90b0e0fba5b54ef4f8
font_02_sfnt_off00012ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF4 10796 bytes
SHA-256: 9ad927c4fafb4c8ab71e1dcea36a45380aba6a749d4f88b43293d5327d3f5afa

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