Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2627bacd3e3adc…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 18:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23c29550aa59a48dafae7589aa83db0c SHA-1: dafcf1ec09654b47e23b6c5e1f50a2152585848f SHA-256: 9a2627bacd3e3adcc2ba5115aff2648d05c3aa815e366ee12f378f860f03cf15
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm. While no scripts were explicitly extracted, the presence of external URIs and the nature of the detection indicate a likely attempt to redirect users to malicious content, possibly for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://fwstc.in/userfiles/file/vodegutemugogiriju.pdf In PDF document text
    • http://casaledellasignora.it/userfiles/files/90151414151.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/jizunezafoxivixano.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/13218325495.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/26178063528.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/88634240977.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2fb039579---48359982741.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/busopi.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/neragusiseve.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/17456763593.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/puzefimimoz.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/19621295080.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/19256540675.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/vifuridusajorufedotevo.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/25793158581.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/29867581854.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/69512995692.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/48339676438.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/nakivifidutilisiga.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/17350663913.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/raretanowel.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/42157463012.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/kanaxemumusabenuxav.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/vusarowunagarixoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ice+cream+3+frivPDF 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_off0000d951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 17776 bytes
SHA-256: aabc9241aedcde41386e052d3371fe936fe6bc5837805069314d31904f637d39
font_01_sfnt_off000107e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF8 10152 bytes
SHA-256: f5977e406cf433c7c120fc3ec2b54e51885082f665fb19dd24a6ee0621e281eb