Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b5f0bc83fa8d27…

MALICIOUS

PDF

76.6 KB Created: 2021-03-21 23:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 293d0d4bae9831c139010d3cfd57cd38 SHA-1: 2e7c383614ef8af05330973ae1b60d9729e00b1a SHA-256: 29b5f0bc83fa8d27f33eb35c06e5be026790cf8d2c0447fb90b08a485a5e03e0
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs further supports a tracking or redirection mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=los+juegos+del+hambre+netflix+orden
    • http://gazagidumow.mygamesonline.org/american_gods_libro_espaol.pdf
    • http://rifijetuvijilam.medianewsonline.com/amebas_de_vida_libre.pdf
    • http://lowuwirakob.66ghz.com/solvent_extraction_lab_report.pdf
    • http://cashtanks.fun/941803597481qu46.pdf
    • http://fsfsfd.xyz/teaching_basic_soccer_skills_for_beginnersfzqdi.pdf
    • http://bitoxifa.sportsontheweb.net/basic_computer_hardware_books.pdf
    • https://cdn.sqhk.co/jojevirelo/X7hfjfY/loop_diuretics_drugs_side_effects.pdf
    • https://cdn.sqhk.co/vefoveted/jhgjCij/beard_oil_kit_target.pdf
    • http://kedugobepuged.mywebcommunity.org/prayer_rain_prayer_points.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gozuketitara.onlinewebshop.net/beats_studio_2_wireless_price_used.pdf
    • http://zutugidod.onlinewebshop.net/present_continuous_tense_worksheet_with_answers.pdf
    • http://xixujoteb.epizy.com/37527317113.pdf
    • https://uploads.strikinglycdn.com/files/6b52bc0e-f3c2-4838-aba9-9f96606fb33b/25976201812.pdf
    • http://davofunup.onlinewebshop.net/12858890976.pdf
    • https://uploads.strikinglycdn.com/files/b68309a1-24fa-460e-842d-f0d9e1cf9090/nuxenuribimogamekoxumer.pdf
    • http://poxizaxo.epizy.com/94565450141.pdf
    • http://luxupuxud.myartsonline.com/david_ramsey_financial_planner.pdf
    • https://uploads.strikinglycdn.com/files/dfd94454-cbe9-484a-8ba5-2c537770f865/liwikomikabimubob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ec.bin
a9ea9ee60f4a5809064369dd8d8a3d175d0db637e4d66c8f164b8648a7432c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EC 5548 bytes
font_01_sfnt_off0000f9a6.bin
75a2b622d6b919f52bb1f896832fd0dbad9a562d0df118c1a59d02afdad6e2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A6 12728 bytes

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