Malicious PDF — malware analysis report

Static analysis result for SHA-256 688269ec98b496ec…

MALICIOUS

PDF

72.8 KB Created: 2021-04-10 18:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 46c8c126a6cb4332aee637a9f9589b22 SHA-1: 203cc7476a8d1498192090e4a2234422b609fcc3 SHA-256: 688269ec98b496ece4aadbf1ad61f0fc327a20cbb6a2a925da5530a3e40b2b71
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for phishing or malware delivery. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or credential harvesting attempt.

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://leonvi.ru/strik?utm_term=bibl+104+quizlet PDF link annotation
    • http://deworul.22web.org/zaviboxifidevufopivebu.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/241cf8b5-daf0-4509-abbd-a5c9485fee08/whats_the_best_robot_vacuum_for_pet_hair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c75f6ed-fb89-4298-8fd9-51c3aec0fcd1/why_is_informational_text_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15389f94-3f1c-4bd5-b63e-67ac01e899bb/zojigudabuvod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5754ee50-dcba-42f6-b7e1-d55eac885d7f/how_much_does_a_waterpik_water_flosser_cost.pdfIn PDF document text
    • http://dovabaz.epizy.com/intellichlor_ic40_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44aac944-a0da-407a-934b-8f92d7ba6ca2/how_do_i_replace_the_battery_in_my_timex_ironman_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7695b404-0710-4cfd-8b5e-ab52b8d04582/wristech_blood_pressure_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/biosynthesis_of_purine_nucleotides.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/18434447648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e162859-8b83-4a24-af1f-a51be65ea6a1/the_human_condition_painting_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/65013153519.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/exuma_airport_flight_information.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/fannie_mae_jumbo_loan_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/muttu_muttu_album_audio_song_masstamilan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2945651d-fada-44a1-8f8b-dfea8327bfb9/lozewalifonopazewekuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/dolovezuluvipisimosonajot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8c5ce0-93a9-4c60-9004-c196fa7d308e/quran_english_audio_only.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_off0000e056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE056 4840 bytes
SHA-256: b4ada779d21459d2744b32b9adbe3b93c7ed3babf2f44d24fee8b596dd5c9e0a
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10492 bytes
SHA-256: 00ba5f43641dae1ebbb12f6b6f6b03f27b084534b4352bc2473fc98edbb41086

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