Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d05baab9365ddd4…

MALICIOUS

PDF

97.9 KB Created: 2021-03-10 16:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1303c022044b6f1964cd7d8eab831133 SHA-1: 872cc5dadd81e5c3ee8120e0aa224a83664c3b78 SHA-256: 3d05baab9365ddd4383def282bc3d15158e8364676b64376881fe4768f13cb04
166 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the presence of 'powershell_folder_size_report_csv.pdf' in the document text and heuristics suggests potential use of scripting for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/wix?keyword=kenshi+recruitable+prisoners+guide PDF link annotation
    • http://alcexpress3.xyz/bebukitasepowasfoer.pdfIn PDF document text
    • http://xobukikop.iblogger.org/34297624875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_6040f8255788e.pdfIn PDF document text
    • http://7gusevshop.website/5968718005939qvy.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/267641617649qk95.pdfIn PDF document text
    • http://housefashion.ru/xemedaborutoxegetarv2e5.pdfIn PDF document text
    • http://pesale.pro/how_to_fix_a_leaking_pallet_jackjmzzl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fd6f0f10a01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_60119785bf2e5.pdfIn PDF document text
    • https://fubuwadedaxas.weebly.com/uploads/1/3/4/8/134897716/4404736.pdfIn PDF document text
    • http://barbanapoli.moscow/odisha_sambalpuri_songg6zus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_600b618d505b7.pdfIn PDF document text
    • http://nextauto02.ru/12104207194xr2fh.pdfIn PDF document text
    • https://razosuxox.weebly.com/uploads/1/3/4/7/134719946/gaderokumenugijot.pdfIn PDF document text
    • http://tricitysikhs.com/ninja_kiwi_btd4_expansionw2ut2.pdfIn PDF document text
    • http://wepiliga.epizyIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxogulu.rf.gd/powershell_folder_size_report_csv.pdfIn PDF document text
    • http://wepiliga.epizy.com/process_flow_template_ppt_free.pdfIn PDF document text
    • http://gobudulofi.rf.gd/why_is_my_hp_envy_5000_printing_blank_pages.pdfIn macro / runtime command snippet
    • http://fewabawunidud.epizy.com/reading_body_language_janine_driver.pdfIn PDF document text
    • http://temomij.epizy.com/24053608156.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/vewomub.pdfIn PDF document text
    • http://sonapap.rf.gd/crimsonland_game_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001376f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376F 2828 bytes
SHA-256: 02201fdaf2752f4422f7629c71039e5f766ffabbddac837aa70011d2fb945b01
font_01_sfnt_off00014179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14179 5444 bytes
SHA-256: 3effb5bc0b9399334872bb3145c3b86984fe0b136812eb58e197ebca52c4b0f0
font_02_sfnt_off000153f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F3 11136 bytes
SHA-256: ad15815a2844152518f39f0676b3c2ccb1ad2fef324dcb05374b46cf71788833