Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee591ff38f58efd1…

MALICIOUS

PDF

72.5 KB Created: 2021-03-06 20:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d0db4b887433ab17cc9029ba52d26605 SHA-1: 9505f59e8e02332aeebf8a3c971c2978380f1c50 SHA-256: ee591ff38f58efd1190a90ac54b403194d8d54e74dd613eb69c35fa4685dc369
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to a domain ('dugedepap.ru') that is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to educational materials, designed to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/wix?keyword=sadlier+vocabulary+workshop+level+c+unit+5+answers+pdf PDF link annotation
    • http://pexevuvukez.iblogger.org/alien_isolation_xbox_one_x_performance.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/nozabobawovixak.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/american_culture_worksheets.pdfIn PDF document text
    • http://zinuxuf.22web.org/vegexakebamibowugogaf.pdfIn PDF document text
    • http://dusixose.22web.org/47136620395.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/61931977593.pdfIn PDF document text
    • http://nubigawe.22web.org/xugaledofozexetonusejebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvujudidasutem.rf.gd/assassin_creed_identity_mod_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f70020-31a2-409d-bdf7-858803b41766/98953226840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221b1338-1cc1-4ef0-8e2c-df2b37590276/california_traffic_citations_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f244bc-0f91-4c1e-aa5a-c36a3a6fc239/does_tricare_cover_counseling.pdfIn PDF document text
    • http://komigot.rf.gd/9137589587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6ab98b-39e7-427d-ac80-cf2bc4d2c3cf/ged_math_tutor_online.pdfIn PDF document text
    • http://jilevatawew.epizy.com/risuzolizuzisodaraz.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/ed_sheeran_castle_on_the_hill_chords_easy.pdfIn PDF document text
    • http://fafamusefene.rf.gd/jet_airways_magazine.pdfIn PDF document text
    • http://fijetetesozaw.epizy.com/52059419658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63cf8d55-f501-457f-b936-689f8f2e5e59/echo_spot_user_manual.pdfIn PDF document text
    • http://zifelibuvofaz.epizy.com/sumosomodoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb5845e-6ef5-4b8b-baf5-3f07fab419b2/lord_i_need_you_chords_matt_maher.pdfIn PDF document text
    • http://diresudavu.rf.gd/how_to_write_a_critical_reflection_childcare.pdfIn PDF document text
    • http://mawokale.myartsonline.com/34698517844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f29934e-78bd-4c52-8432-95bd48d1003e/sony_rx10_iii_vs_rx100_iv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c6d04b-97b6-46bb-9806-84fe6ccba014/does_yennefer_have_elven_blood.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_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 5928 bytes
SHA-256: 32961dbaf5f9622349eec04b9f76d506a2f70d65305e017b3ffc8679c2970ad3
font_01_sfnt_off0000f1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AB 9940 bytes
SHA-256: b21f7c35c68a1c2040462ce2fb166eadccdcb0797c47603abac5bf0ce480b67e

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