Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdd6e38c9ef593f…

MALICIOUS

PDF

75.4 KB Created: 2021-04-30 00:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 82e0d9ea093240803f1df9fe86b24d8a SHA-1: 2096baaf2c60dd0b7b891b4cef1c4648e05b95e1 SHA-256: 0cdd6e38c9ef593f9815d2b6ccb5803f95381125000b59f8383c0897e771d303
106 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting domains. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain commands or references to command execution, potentially to facilitate the redirection to malicious sites. The ML classifier strongly indicates maliciousness, and the presence of external URIs points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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://lozipotod.ru/strik?utm_term=how+to+reset+insinkerator PDF link annotation
    • http://nokojatagi.mywebcommunity.org/how_to_run_python_code_using_cmd.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/xuwesufazeman.pdfIn macro / runtime command snippet
    • http://rovanenafet.getenjoyment.net/6382523942.pdfIn macro / runtime command snippet
    • http://bestsalestoday.xyz/fortitude_valley_shopping_guideesbes.pdfIn PDF document text
    • http://websporizle4.com/65001744194aauws.pdfIn PDF document text
    • http://towajemikof.iblogger.org/learn_actionscript_3.pdfIn PDF document text
    • http://blancop.xyz/church_flyer_maker_templateqjsfj.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/13484476743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ae8fb8-c40a-4735-ae44-017e412fa104/xepizosax.pdfIn PDF document text
    • http://javoxowixeb.rf.gd/tolugubudim.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/60116242144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2aec73-ac07-42cd-91bb-4c84ee82c851/misbehaving_the_making_of_behavioral_economics_ebook.pdfIn PDF document text
    • http://netojukab.rf.gd/enseanza_que_deja_el_libro_el_caballero_dela_armadura_oxidada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c2ce45-504a-47fd-bab6-51f07024bc4f/gdp_and_national_income_difference.pdfIn PDF document text
    • http://jajuzefob.rf.gd/85731249050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10fc9aa5-7e2e-4fe8-ae63-201d0f7a3d32/41158245259.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/medical_waste_management_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd4c8559-4cbb-4e1f-b3db-ba1195f0a721/99189999844.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_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 4764 bytes
SHA-256: 4aa7b08c9985d9be3ec712f578ce29d12c7664dd6a95e78e01fae99fdca3567f
font_01_sfnt_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 10816 bytes
SHA-256: cf753c5fcf694f1541e79f229738299e50ef9de06f648615f4e8fe06fb9b3780

Open this report in the interactive analyzer, or submit your own file for analysis.