Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd5ed7524a35215…

MALICIOUS

PDF

73.9 KB Created: 2021-04-05 00:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 15278395cca03af40de620e790aa2b44 SHA-1: 1846e73d405c61965940ec7268cfd79e0880970c SHA-256: ebd5ed7524a35215c7651df990b1f785ffdb0feb5016aea6f33b5faa9f6b2c99
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely leading to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ponafet.ru/123?utm_term=free+lesson+plan+templates+high+school PDF link annotation
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/gadolepakemaxi.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/risk_game_board.pdfIn PDF document text
    • http://krokoboko3.xyz/fikakobata62eww.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/d7584d804a6.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/vejibetawanabegivawerope.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/2075b0f.pdfIn PDF document text
    • http://copyrights-notices-helps.com/66341969776whtwy.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/certified_six_sigma_master_black_belt_handbook.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/d6YheAi/70581121321.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/InhcHie/calculadora_iva_irpf_online.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/menoj.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/roots_and_coefficients_of_quadratic_equations.pdfIn PDF document text
    • http://bet-info.ru/vepozusewibobasovhe1.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/jeramofurenaxiloripelove.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/hchhLtX/woxavozem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/business_law_today_the_essentials_11th_edition.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/12651167124.pdfIn PDF document text
    • http://pekomuvave.myartsonline.com/nuginukutu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 5300 bytes
SHA-256: 5bbfce012b7a123890ea17f81f614b82b328eb812db0d2eb4d164b199c48f88a
font_01_sfnt_off0000f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 10216 bytes
SHA-256: 9fafe229ad8089659a92a3206ffd589972bd7b60bb9b9f56e64bd255e6698610

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