Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72dafa26d3a47e0…

MALICIOUS

PDF

77.4 KB Created: 2021-03-15 02:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e35a80fbea14ef3bb6e14d3824d8d1b5 SHA-1: 8fb7d7086598df59daea686cb27494d7b3c50ee7 SHA-256: c72dafa26d3a47e069f1f0f3e9e9ace72315df069dea649a8cd6b56b62a2c537
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure, and the presence of external URIs indicates an attempt to lead the user away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=anything+can+happen+saint+jhn PDF link annotation
    • https://cdn.sqhk.co/jabosuve/jh9iiaO/baseball_boy_hack_download.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/tajusupex.pdfIn PDF document text
    • http://llloooodddd.space/283017767334gv3z.pdfIn PDF document text
    • http://gufutaca1.xyz/homer_iliad_summary_and_analysisp1bvq.pdfIn PDF document text
    • http://insitemonitoring.com/zorixofawuduvutexuzegwnf0.pdfIn PDF document text
    • http://gisujug.mypressonline.com/pefodurukikexedujudoxik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5fe92be8cacbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406166/normal_5ffe9b72ad376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401723/normal_5fc5917771e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_5fd0f739c2c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_600b441150d8d.pdfIn PDF document text
    • http://rujitexoxobag.mypressonline.com/63785047507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_602ad0cf28266.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/hhMeEE0/forme_allonge_en_anglais.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/marxist_literary_theory.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5ff8fd6f868c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373248/normal_5fcd5f94727c3.pdfIn PDF document text
    • http://detonic-italy.website/access_database_templates_2010u8tes.pdfIn PDF document text
    • https://cdn.sqhk.co/jipazebej/vWjjyPX/abcmouse_early_learning_academy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503533/normal_600419339309d.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/FieYUie/damipujebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numunenoji/frette_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/tufepujanaxiwegaduwa.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/lolirinomuda.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5236 bytes
SHA-256: d05599f0e4b724c8a99f0e8268c814786416770cc9174abf661eaeca273cf669
font_01_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 12004 bytes
SHA-256: 0f0cf7cbe5c70465719f130a05a8828d5d37f5f4ecec030aa75414d120b8893d