Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ca3eb0779f5401…

MALICIOUS

PDF

94.8 KB Created: 2021-03-05 02:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06b794f22d83d7fba57bcec76269d4a SHA-1: 77578860d64b162ba4d7280ebff718f824100e2e SHA-256: 24ca3eb0779f5401f59b651d2827719a6e417b6d4f6afa2da19f4d72d41e2539
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though truncated, suggests a lure related to academic discourse, which is a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=structure+sign+and+play+in+the+discourse+of+the+human+sciences+citation
    • https://cdn.sqhk.co/tavedikovo/tjc66oU/dibovigigun.pdf
    • https://cdn.sqhk.co/gapekozuwa/zghYjbQ/simply_piano_app_online.pdf
    • https://cdn.sqhk.co/jopubelo/ehg4Pih/startup_games_austin_2020.pdf
    • http://dovavetupal.22web.org/nabaviw.pdf
    • https://cdn.sqhk.co/buxifuludo/hgBLijZ/police_radio_sound_mp3_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuxefofoxomar.epizy.com/formal_analysis_definition_art.pdf
    • https://s3.amazonaws.com/lolaritemukole/ncis_season_19_episode_guide.pdf
    • http://zomimek.epizy.com/najasapadizizalojebudod.pdf
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_4fff1cff94ef4761ac9031703d9cafa9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f9765c84-c281-426f-90ff-0766a13b2bfd/xevigezexuwexusala.pdf
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_f37c7d277b70472c9c8b747bc5c6811f.pdf?index=true
    • http://vipiwimepi.epizy.com/wesijejabib.pdf
    • https://s3.amazonaws.com/nakuzafol/carrie_underwood_alone_american_idol_performance.pdf
    • https://uploads.strikinglycdn.com/files/0d7c6cf5-89c2-456a-b201-e2bf8be05315/actividades_matematicas_para_segundo_grado_primaria.pdf
    • https://uploads.strikinglycdn.com/files/f097dd51-e2f1-457f-8271-995243962997/best_free_online_guitar_lessons_youtube.pdf
    • https://s3.amazonaws.com/kizugokofo/kupidabugo.pdf
    • http://kudetewususitup.rf.gd/prentice_hall_pre_algebra_online_textbook.pdf
    • https://uploads.strikinglycdn.com/files/9708d5d9-caf6-47ff-8da2-f7012db35e5b/are_the_wonder_weeks_accurate.pdf
    • https://s3.amazonaws.com/fokapikow/battlefield_3_crack_free_pc.pdf
    • https://s3.amazonaws.com/sasufufa/what_the_bible_says_about_self_sacrifice.pdf
    • https://uploads.strikinglycdn.com/files/49a8a318-f089-4a36-8ec4-31770b012807/58240804954.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001334c.bin
6239f1396363a9f5421a8028de3831511a4185a110335c55917b3a8738787d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1334C 5776 bytes
font_01_sfnt_off000146d4.bin
51238797d42a5ca53f0f5dd82784b665837fc05c43fa0d35e94ee6b2fbc2d147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146D4 11576 bytes

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