Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c6e956edf7ae7a…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 09:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a6d243aaa9a33b04b22631cd4d32a26a SHA-1: f257c98c0f64f3adfce90d8aa21b1ef9498c1c5a SHA-256: e7c6e956edf7ae7a69877d24b73d412b636c55e0e56b4fafdb0baafc63e08f2b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strong intent to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains text related to financial terms, suggesting a phishing or credential harvesting lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=equity+market+capitalization+balance+sheet PDF link annotation
    • http://zisuroto.mygamesonline.org/selenium_webdriver_python_3.pdfIn PDF document text
    • http://manovina.mypressonline.com/boy_names_meaning_son_of_god.pdfIn PDF document text
    • http://usmileofficial.site/rufitanewerajedazabugikuxbcp15.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/11850997490.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/excelsior_brewery_ice_house.pdfIn PDF document text
    • http://rankingcoach-seo.com/vikizuvof4sb1t.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/document_to_convert.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/alif_novel_complete.pdfIn PDF document text
    • http://upgrade4me.com/diluvigigobibile4teiz.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/sibar.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/wrx_running_lean_symptoms.pdfIn PDF document text
    • http://douchelabs.xyz/974609225304zuj0.pdfIn PDF document text
    • http://zarabatyivat.ru/bollinger_bands_weekly_charts92f74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_57207b6fb798413db1f1cc2c68ca5b7a.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_7562be257dfe44e180d6afe518dba3e1.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/xitinugox.pdfIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_c59cfa2872d148f0ac30c263e2dfcbf9.pdf?index=trueIn PDF document text
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_897de6e381e04ad3a44f21b73bbc2ca3.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_f031888c5f4844f99b2bc63d206794e4.pdf?index=trueIn 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_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 5612 bytes
SHA-256: f909e592dfb4ae384dcb50d9d2f808c6a843bbfeb70f6a5c58dc75f0afe487b3
font_01_sfnt_off00011f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F40 11928 bytes
SHA-256: 21ab2e3e77824cc941144cdf405bf343a0205a611e57067c6b1b457551048261

Open this report in the interactive analyzer, or submit your own file for analysis.