Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5bfd79deea88ae…

MALICIOUS

PDF

78.8 KB Created: 2021-04-14 23:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 715e4d61c4e354bd42e1f38f78927100 SHA-1: 12b1e19221169a0582c8a6c42f32e425ca3398aa SHA-256: 2d5bfd79deea88ae3cf875929ffd73469d112e751308db6bf3a0031c96a7c4c5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=gmat+official+guide+2020+pdf+reddit PDF link annotation
    • https://cdn.sqhk.co/fegokirar/ChdTgg8/best_formal_dress_boutiques_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/hmojffA/aruba_2930f_24g_4sfp_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/ihijeid/problem_with_solar_system_model_of_atom.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/86123431652.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/ciihbic/adenoid_ameloblastoma_with_dentinoid_a_case_report.pdfIn PDF document text
    • http://votapusi.mypressonline.com/93478596330.pdfIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/best_sketchbooks_for_markers.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/is_medical_coding_still_in_demand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3ac209-5af3-478a-84dd-3d3f22aaf454/fesenoxebe.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/vuwix.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/32370871111.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/gst_authorisation_letter_format_for_partnership_firm.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/mufib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6c1471-5151-4440-aeda-396b99c127ba/a_midsummer_nights_dream_modern_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad24106-2017-4671-8bef-260f5b99cf23/pepirozatabaxazizaw.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/how_to_get_a_list_of_commands_in_cmd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccad33fa-8028-4fbc-9220-c4616a05f3d9/somimokilalakiwosuvol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3996b124-70fc-416f-88a6-f69acda0465f/left_hand_of_darkness.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/how_to_restore_ipod_nano_6th_generation_without_itunes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9934eb5f-179b-44bb-88db-a943dcf5e6d1/zovojemefedesuti.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/buku_panduan_akreditasi_puskesmas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32069ed-43a2-4463-9358-d98f4635feb1/cloud_9_play_characters.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
    • https://uploads.strikinglycdn.com/files/ccad33fa-802In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5600 bytes
SHA-256: ef04063ed676a5e86491f32006c2eb6049affe7241279485801f67ca0d847fad
font_01_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 11384 bytes
SHA-256: 0a134c7913ad8ea2d32727efe1d86300238053ac7965d0201bd984484afd59a6

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