Malicious PDF — malware analysis report

Static analysis result for SHA-256 70eb037593245fb7…

MALICIOUS

PDF

81.8 KB Created: 2021-09-07 07:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ce50226564a16c84be01b6543066d1b SHA-1: 7baf2e1bf834278529cb255cddb2a29064c323fb SHA-256: 70eb037593245fb7ecc959fc958435e21e957fe4c3e6da303cbea4acff98b299
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous potentially compromised or disposable hosting sites, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maremania.net/img_pagine/file/jomivube.pdf In PDF document text
    • http://auswallendorf.de/userfiles/file/29089015204.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/28808924991.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/528a08d665b20c1728c6a104059b6688/kekigekifowi.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/99001702341.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee8f34d2d2---setenirejozakobuvesevem.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/f198b9df3fb54dff723c8c6370d936c0/kevusig.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/46490317.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/60669033472.pdfIn PDF document text
    • http://armanetti.com/images/wetazodufaros.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078aa575304a---77312294549.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/feveginakavezo.pdfIn PDF document text
    • http://vizcsap.hu/files/file/46293552882.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161355e4880d95---56415284646.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/futebus.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/damazavofaliwek.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/22085220662.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/58529478727.pdfIn PDF document text
    • http://immopolignano.lu/images/31242693696.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ed793086885---durapetajafifuref.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/86503730822.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a0b45c17---41063377428.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/38986997686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=oncology+nursing+handbook+pdfPDF 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_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 11140 bytes
SHA-256: 85d297bab77562ced8f1dfb1834f688d22be2e4e4abafe3c2c9dd5d8928ebb85
font_01_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 17492 bytes
SHA-256: 46fece17d3ff3e0ee03c1f1bd5564d397fa49ff13637de41ac0191654623ffeb
font_02_sfnt_off0001215e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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