Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edfc0f81d58ef0c…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 17:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 512cc9e6d24c685faa239bbcee0f84fa SHA-1: 9ed35dbbf135e23d6f97c75e86d0ce958471843e SHA-256: 0edfc0f81d58ef0c5c5b53434fa9b5ffd09c9a5a62905b26e24cd209e643baf0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to 'jacksth.ru/award', indicating a likely phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests the document is designed to host many links, potentially to obscure malicious activity. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

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://jacksth.ru/award?keyword=what+is+a+fanatic+villain+name PDF link annotation
    • http://xejopegig.mypressonline.com/xuwojuvorubulu.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/haNpgfD/jakupuniru.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/how_old_is_a_cricut_expression_2.pdfIn PDF document text
    • http://watertea.space/66972073642ivxdv.pdfIn PDF document text
    • http://draiwenstore.online/zepubi6k8xd.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/ziresetupalaneg.pdfIn PDF document text
    • http://telgrm.site/how_to_replace_capacitor_on_ac_unitfd73r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/the_discovery_of_dnas_structure_worksheet_answers.pdfIn PDF document text
    • http://dekifovep.epizy.com/wow_classic_addons_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/xumigu.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/catia_v5_export_formats.pdfIn PDF document text
    • http://jemileti.atwebpages.com/wirenemezenafukon.pdfIn PDF document text
    • http://jimarol.myartsonline.com/everstart_jump_starter_750_amp_charge_time.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/vilidexiwol.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/golasatukulenisik.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_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 5100 bytes
SHA-256: 2f806f2ddfc8f719bb9db09135ba8c8461f8d6e8ba7d951f038454e22cef9b1a
font_01_sfnt_off0000feb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 9508 bytes
SHA-256: 30bd1ece9fbda3f07ee9f0d81b28fe215da8db3afe748117bdf7c07ddb8b7eba