Malicious PDF — malware analysis report

Static analysis result for SHA-256 3054761332ad6ff3…

MALICIOUS

PDF

78.9 KB Created: 2021-09-09 00:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 541d5d7bb414a09b06334baa4bfff815 SHA-1: 9e676e98eb99f0b58023db941694de1a17b86991 SHA-256: 3054761332ad6ff3f74fa6e7290fa0e1ba6c511d3734a488050f416344e0615e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ancient-theater.gr/media/file/31617538090.pdf In PDF document text
    • http://czpohledavky.cz/userfiles/files/16861835341.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/lemibujipu.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/60442403295.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/vagina.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/47889496415.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/44561061075.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/kupifaz.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d8506442f---sezizurapanenatesagedegu.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/56168849351.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d90866527---xopidixak.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/94144825457.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/45935464324.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/71309273753.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/53860587116.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/delowejapa.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/pizudaf.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/piminuruna.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/mobedakonugazofunifu.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/lezijatuxinorakevizovukan.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/bigesusurajenobe.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/vefivadirarifutubelika.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/bowijubekizuxetol.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/kakutuworu.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/fifawasarive.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/90991865882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=hablando+bien+se+entiende+la+gentePDF 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_off0000cd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD20 10456 bytes
SHA-256: bded0e53db1b5bf240c664dfd8ce1574efb26ff601d2fd49eadff237727c1c5e
font_01_sfnt_off0000e4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 18648 bytes
SHA-256: cd426561daf2993e6640591505a4e5b980b5db9214eafb573e3c5b3b8f26ed62
font_02_sfnt_off000113b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1