Malicious PDF — malware analysis report

Static analysis result for SHA-256 8850d5a117be8f94…

MALICIOUS

PDF

75.8 KB Created: 2021-04-01 08:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a781df343a3c743142f3095cf251f13 SHA-1: dbd52167c94b3352c3aeb85fb8baf6af8d99a83d SHA-256: 8850d5a117be8f94a2096531e6f891f01c2e7c834f8cd93223fa3d3232af3721
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 phishing or trojan payload. It contains multiple embedded URLs, with the primary one being 'https://soxebez.ru/123?utm_term=functional+python+programming+lott+pdf', likely serving as a lure for the user to download further malicious content. The document body, though heavily obfuscated, suggests a deceptive title and authoring application to mask its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=functional+python+programming+lott+pdf
    • http://dkmz2.club/quickshortcutmaker_apk_2.4.0guyyy.pdf
    • http://testersairf.xyz/38727241005e8isq.pdf
    • http://uuuuull.space/entropia_universe_melee_guideghohc.pdf
    • http://memisada.mygamesonline.org/33805741644.pdf
    • http://kazexajisodibu.medianewsonline.com/sikibaxapavo.pdf
    • http://kawasus.scienceontheweb.net/58345925650.pdf
    • http://pipawopozovifo.iblogger.org/diablo_3_new_season_leveling_guide.pdf
    • http://dimozakebaba.scienceontheweb.net/beauty_and_the_beast_theme_song_piano_sheet_music.pdf
    • http://dunotap.iblogger.org/gudoguxe.pdf
    • http://ragitikevuwa.22web.org/rojaxasewimo.pdf
    • http://fisujerekuvij.getenjoyment.net/adlarin_menasi.pdf
    • http://visunuduxat.mypressonline.com/can_humidifier_make_baby_cough_worse.pdf
    • http://yoga-fitness.space/blockchain_bubble_or_revolutionn67pg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_9d66fcc9b239427b8b73fbc030311344.pdf?index=true
    • http://kedumuwimafam.rf.gd/millennium_development_goals_download.pdf
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_699d446800964a1991a31b0669b52dac.pdf?index=true
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_25d6df611798405fb221ce4249c39b77.pdf?index=true
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_d26a6ed3b78848f4a4b1ad95a0b3e135.pdf?index=true
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_b079b11fbdcf42e28939f87399c2b4a3.pdf?index=true
    • http://fumexilali.rf.gd/best_xbox_one_skyrim_mod_load_order.pdf
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_9d9a4e293b28412b8ee9f65d16eecba1.pdf?index=true
    • 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_off0000eb6b.bin
a817c00345ad6810e6a613a9008f25435118a872e3e5cd75362c25211ba95f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 5448 bytes
font_01_sfnt_off0000fdd8.bin
7a10ca8d6dff1d63eccd2c84d060beb1a2cc5511d1d3f9baa670d7a77bb0254a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 10528 bytes

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