Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e33d852dc33103d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-12 18:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0735cffbb7b875eaf85fcbc2aec7fa7f SHA-1: 9d09ce0cc414c5b956f8846aeea3280e2c182222 SHA-256: 2e33d852dc33103d97ad386989d5cf00d35a1bb5df864b5a864699bec8b93d55
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a significant number pointing to disposable hosting and redirector services, suggesting a link farm designed to distribute malicious content or phish for information. The presence of embedded URLs and the heuristic indicating a link farm on disposable hosting strongly suggest this document is part of a phishing or malware distribution campaign.

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://resalured.ru/123?utm_term=refraction+of+light+worksheets PDF link annotation
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/d89077bcfd25664.pdfIn PDF document text
    • https://jipedopifuxo.weebly.com/uploads/1/3/4/0/134042804/jodirivu-womavi-poded-topeb.pdfIn PDF document text
    • https://mefarixikokupa.weebly.com/uploads/1/3/4/7/134759110/jerugif-rabapemixatuv-bemigadaporaxip-kogiwivud.pdfIn PDF document text
    • http://hugertely.xyz/dell_b1163_tonericgvc.pdfIn PDF document text
    • http://dsv-trening.ru/microban_24_hour_sanitizing_spray_canadan118m.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/17095167298.pdfIn PDF document text
    • http://desoneveru.iblogger.org/83432265117.pdfIn PDF document text
    • https://pinafizupefed.weebly.com/uploads/1/3/1/3/131380591/0a4ff4b95751b.pdfIn PDF document text
    • http://numberoone.xyz/zonagasuvetomuwepiluxpmy7r.pdfIn PDF document text
    • http://alisabor.design/free_funny_ringtones_for_samsungv9del.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebafitesulodu.epizy.com/answer_interview_questions_you_don_t_know.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/cetosis_definicion.pdfIn PDF document text
    • http://vaxuraribo.rf.gd/mozagenobusijarufugiduvib.pdfIn PDF document text
    • http://sorovafijopina.epizy.com/carry_on_bag_with_removable_wheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80dbaac4-5e33-4f7b-822d-a0ea444d1906/lagezagal.pdfIn PDF document text
    • http://wutobonedurovit.rf.gd/english_grammar_workbook_free.pdfIn PDF document text
    • http://pijofabuzipa.rf.gd/zavufodivufowatifomim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03875994-96ff-4b7c-9543-5e81dbb19fa5/pride_and_prejudice_audiobook_rosamund_pike_free_download.pdfIn PDF document text
    • http://tesekinapoden.epizy.com/94603429895.pdfIn PDF document text
    • http://fosudav.epizy.com/kavegawazijegelotokon.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_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 5308 bytes
SHA-256: 9d1344df65852fa93af78681c9512911303316188b2bd55f5170af655281389d
font_01_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 11696 bytes
SHA-256: 2af5d911283cc7a5296289cfcc22bef4b4986cfb9098a7782027f7f4c6ab819e

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