Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f200a8f7ea944f5…

MALICIOUS

PDF

65.3 KB Created: 2021-03-28 22:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3bdc95dd11f7f1a9f6c05bdd70e53527 SHA-1: 46e3fe040bf7384b55ed3182a169d52094e3aa98 SHA-256: 4f200a8f7ea944f577bfbf44233e902ce1c07130fbdda6c09eb9e0f3b86907b7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that lead to suspicious domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Splat 100 chart blank' and 'wkhtmltopdf', indicating a potential lure for users seeking information or tools.

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://midufefew.ru/strik?utm_term=splat+100+chart+blank PDF link annotation
    • http://rawenspant.online/class_matters_chapter_1_summaryarl46.pdfIn PDF document text
    • http://copyright-notice-ig.com/6661261952m6lg.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/hjcighe/brain_up_toys_store.pdfIn PDF document text
    • http://kneeksi.ru/nice_guidelines_medical_emergencies_in_dental_practicekevay.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/ijgfdoe/wawulugefabopez.pdfIn PDF document text
    • http://complerbnp.com/dedilunopotislzjoq.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/2zcgdgj/little_fox_chinese_level_3.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/iX5bjhd/62477850746.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/awhaT0G/78304912379.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/jTjchhQ/harvest_community_church_near_me.pdfIn PDF document text
    • http://ozalupa.space/printable_fax_cover_sheet_examplexbv5i.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/8deb9062-5e16-45c7-b2c5-9c6c87521830/sunumumujukagog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2255ff-000f-43ab-822f-fc81bec925c7/what_to_eat_after_2_day_detox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91804a54-cc88-47b6-bbee-d1c6cec9822a/marketing_management_major_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce12136-9da5-43b6-8acf-d8db06500734/how_to_connect_google_earbuds_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8523ea-a39b-4a90-b3bf-91ccfd7b2a94/rowirorojujites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08aa238-55f4-4cb7-b66a-3a8edd30542a/what_are_the_8_inflectional_affixes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38068c0f-bc8b-4e7e-bbdb-f25f1a0c9e78/what_is_the_difference_between_a_4_point_and_5_point_gpa_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bd852f-f87e-4bdc-9db6-82452f40074d/rivosadexogulaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c272550-3c74-4964-bdf3-86807e0706ef/chrono_trigger_ds_for_sale.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_off0000c4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F5 5344 bytes
SHA-256: ca0dfec832139611ce1d72b3492c6e10ea8ef5f1a1af4a81114f1e1c06eee834
font_01_sfnt_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 9636 bytes
SHA-256: f1ec11ccc9f95571a20e593991d8b4a8f015e3c83444ad76228fbe62fc671dea

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