Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed9f35c05eba020…

MALICIOUS

PDF

122.9 KB Created: 2021-03-31 08:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2c56f5b3df9faa771d8eb1c1610acb72 SHA-1: f00a1e6ce0140371e40bb29c4a18c19870297030 SHA-256: 2ed9f35c05eba0204346b3306c67d21e985d646e77e68f0d5de6f6128e3e2979
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=one+thing+remains+bpm PDF link annotation
    • http://kleomaften.online/topinumikinum5yi.pdfIn PDF document text
    • http://pc-remont.website/samsung_galaxy_a10e_have_wireless_chargingm54zs.pdfIn PDF document text
    • http://amorexpo.com/fantastic_beasts_and_where_to_find_them_2_online_streamh33xt.pdfIn PDF document text
    • http://trujillostacoshop.com/how_to_change_cookie_clicker_codeh67k9.pdfIn PDF document text
    • http://batmbatm.ru/32897137904h4y42.pdfIn PDF document text
    • http://timelessdecorum.com/fofejukip9yn3v.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/wemizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_6058e7386a202.pdfIn PDF document text
    • http://prodson.space/457242463787hl73.pdfIn PDF document text
    • http://teenagetutor.online/ximapeluveduwigaqti08.pdfIn PDF document text
    • http://xagimovuroj.22web.org/s-_corp_accountable_plan_reimbursement_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5ff581036bc84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_603a2a4d68585.pdfIn PDF document text
    • http://mydenverneighborhoods.com/husqvarna_455_rancher_bar_nut_sizeqd62o.pdfIn PDF document text
    • http://itwow.info/jutavifetewefejapbldjd.pdfIn PDF document text
    • http://eurostore.info/womabelaverel1nzcq.pdfIn PDF document text
    • http://hargotel.xyz/nonviolent_communication_synonym43lby.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomupinoteripa.epizy.com/guidelines_for_blood_pressure_diagnosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d5d3a7-3a34-4c38-8abc-758e10bdd98c/can_you_play_2_player_monopoly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e0fb03d-da20-4297-b505-8e39ecbf3233/what_is_your_religion_meaning.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000181fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181FD 3540 bytes
SHA-256: 0fb1f021cdd361b234765113e3bfe24e96906fd99e295621c0b3be3e980f2018
font_01_sfnt_off00018ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EBC 5368 bytes
SHA-256: 3308de315a1335a6a92ab1b20b0700bc7b5cb6a3e54041a1d893ccf861b4e649
font_02_sfnt_off0001a0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0CB 11616 bytes
SHA-256: 0a11015ba5847f59ed7ba01225e8e0e20ae6c291e5930b3164e4c39137cca21b
font_03_sfnt_off0001c7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7F9 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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