Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee74ea346c7c1da…

MALICIOUS

PDF

84.5 KB Created: 2021-03-17 05:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21256e145ccb332a6c8ab74ab7d577c5 SHA-1: bd596608e0a87078e0f563353c6b9abdcc7a476d SHA-256: 9ee74ea346c7c1da2a074e47c5752c70036d34ddbdbec63bfda08d0a4b313517
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://leonvi.ru/wix?keyword=learn+to+walk+before+you+run+essay', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to an essay, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=learn+to+walk+before+you+run+essay
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/muxinez.pdf
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/7fefa093a449.pdf
    • https://cdn.sqhk.co/jarogofef/hghfjie/zorujad.pdf
    • http://bcpzonasegura10beta-viabcp.com/khle_Schild-Blase_rolltaspo2.pdf
    • http://dvigatel.guru/guzumdslvd.pdf
    • http://sentytld.online/download_little_big_snake_mod_unlimited_moneyanlas.pdf
    • http://vuzatiriranune.22web.org/x_plane_flight_simulator_download_apk.pdf
    • https://cdn.sqhk.co/jojojidatun/dgdWiSM/fish_aquarium_supply_store_near_me.pdf
    • http://legko.travel/86478840762yhpck.pdf
    • http://dogalijun.scienceontheweb.net/baofeng_uv-5r_illegale.pdf
    • https://cdn.sqhk.co/wobuwozavenu/tbhdwgb/calendar_template_word_2016.pdf
    • https://cdn.sqhk.co/tezizejaropu/hcKghhi/basespace_er_update.pdf
    • http://sifimomikev.sportsontheweb.net/ruxabudefiretusiserim.pdf
    • http://devlp.design/onan_generator_service_manualezh7v.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/padosumifubobo/the_chronicles_of_narnia_movies_ratings.pdf
    • http://xatopuwapapifo.epizy.com/acer_aspire_v5_571_touch_screen_replacement.pdf
    • https://s3.amazonaws.com/kezemiradigu/how_to_fix_charging_port_samsung_tablet.pdf
    • http://jadivepijuga.myartsonline.com/metro_map_delhi_download_2020.pdf
    • http://rugafejowa.rf.gd/11455189508.pdf
    • http://liraperuwuw.atwebpages.com/how_to_improve_lyrical_dance.pdf
    • https://s3.amazonaws.com/kujapomib/how_to_add_transmission_fluid_to_a_2005_chevy_malibu.pdf
    • http://jozizirepimetel.rf.gd/nene_ambani_telugu_hd_video_songs.pdf
    • http://lajawul.epizy.com/kusitowuli.pdf
    • https://s3.amazonaws.com/kaxukok/tejipamomejabusamuvusus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1a.bin
f19152c42813021124816deb2c4c78c0e5dd9c6449ff279f249fc785f38167f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 4932 bytes
font_01_sfnt_off0001100d.bin
b89dda428128faee80f0ff4f611ac07437e39cfa2fab5d46725f62921f8b1509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 10812 bytes
font_02_sfnt_off000134c2.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134C2 4324 bytes

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