Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3d5ebc086cf7b6…

MALICIOUS

PDF

74.1 KB Created: 2021-03-12 11:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e0e865d733b9cfc332daa4e7b1402e46 SHA-1: 23ba72e86026d2e93958251f8a9be087ef06d8c8 SHA-256: ce3d5ebc086cf7b66c442979f366c3437249ddc39c667d13b8f6672eaa857ac3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates potential execution of commands, possibly via embedded scripts or exploits, which is a common technique for malware delivery. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://midufefew.ru/award?keyword=circulatory+system+worksheet+pdf+middle+school PDF link annotation
    • http://metazexepajesen.22web.org/alopecia_androgentica_feminina_tratamento.pdfIn PDF document text
    • http://8gusevshop.space/woriluzosavivamijpjhc.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/73039852491.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/2._3_solving_absolute_value_inequalities.pdfIn PDF document text
    • http://salleapp.xyz/7576788696g2f46.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/windows_powershell_ise_free_download.pdfIn PDF document text
    • http://nakozek.mypressonline.com/20510574009.pdfIn macro / runtime command snippet
    • http://pupigojoniru.mypressonline.com/calendario_2020_para_imprimir_mensual.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/23954304662.pdfIn PDF document text
    • http://nimanexobubibub.onliIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwurekatexo.atwebpages.com/wemelejiv.pdfIn PDF document text
    • http://turebaso.epizy.com/stormtrooper_helmet_template_foam.pdfIn PDF document text
    • http://surewefuwiba.rf.gd/black_and_decker_3_cup_rice_cooker_replacement_bowl.pdfIn PDF document text
    • http://tisikifapov.rf.gd/cuanto_es_un_metro_cubico_en_cm.pdfIn PDF document text
    • http://manugefax.epizy.com/vilojuboxowilamameso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc2e51c-aed7-4918-8825-789279584362/legogedizotuki.pdfIn PDF document text
    • http://rowabereduxafu.epizy.com/bodyguard_season_1_episode_2.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/what_is_bible_in_arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76c1425-ac40-4678-9ec3-a02f060f03bd/lufus.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_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 5560 bytes
SHA-256: 1e9a411de63a8aeb3abf13e8b651251b2108e46b293f33b65a8cd96b3ef575b0
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 10260 bytes
SHA-256: b143caf5851e6426e6e3b063ddbc20494f893b0ae74fcd69938fb05a1c8691b4

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