Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2161942d3af1cae…

MALICIOUS

PDF

70.0 KB Created: 2021-04-15 12:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: af234f38e86962d01680b1c262057373 SHA-1: 90d5c569496c596e1fdc3946aa11a3a6a81c4927 SHA-256: f2161942d3af1cae557ddcddb8d4ffb3c434936dff53ab94b50f9218fbd0eedd
96 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. 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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=forward+start+option+with+fixed+strike PDF link annotation
    • https://cdn.sqhk.co/jotepomi/viaVt4J/meme_soundboard_2019_online.pdfIn PDF document text
    • http://amorexpo.com/sirugimekubepisavimmb4j.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/ECihihA/pregnancy_baby_growth_chart_week_by_week.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/ibKjcKA/carnival_games_rental_malaysia.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/movie_converter_to_mp4coisv.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/djjf8ia/meteor_shower_michigan_september_2020.pdfIn PDF document text
    • http://detonicinitalia.website/35938864797g5mct.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_606cf58020239.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/wKgeibI/bollywood_ringtones_download_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_603e098ad76a6.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/Px7jdOP/3d_photo_editor_for_android_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/jdibhda/bare_knuckle_fighting_championship_11.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/351d89d8-58d7-42ed-a612-f072948a1645/lidel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b840c5-ab81-43da-bea9-8f1eff78a1f8/pride_and_prejudice_cast_1980.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/duxejegelarunujigawip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fc2cf3-bd75-4a5f-ad92-5eb0b9480f82/how_to_set_date_citizen_eco_drive_wr100.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/fed_up_documentary_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b318cb1-15fa-4d66-8ab2-9df795b5cbcf/what_is_the_process_of_breathing_called.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/mahatma_gandhi_thoughts_on_life_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/lufobimikevemapi.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_off0000d557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD557 5276 bytes
SHA-256: 0eab8d1032febd7bf849000cb75793b64c2a74e91bd11c973b2349dd545e5d9b
font_01_sfnt_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 10240 bytes
SHA-256: 4e5664f642d7a9f9ed04ddfe80a51e35d571fa6ad333a670a8d54f15d044b7d5

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