Malicious PDF — malware analysis report

Static analysis result for SHA-256 298903a55e546c8a…

MALICIOUS

PDF

69.4 KB Created: 2021-04-07 23:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a34a83d8191e9254a7d59f95f43c4dab SHA-1: e825b41905e3e58a6994e5c605388a3f26c9c2e8 SHA-256: 298903a55e546c8a98f998f2bc7d3450bae82c2de940bf5f803a0fa14faeb60a
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 threat. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to mathematical inequalities, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=solution+set+for+inequalities+ordered+pair
    • http://clubstore.pro/budukimomazoyay1z.pdf
    • http://sberpodarok2020.online/netflix_android_tv_apkh3uas.pdf
    • http://modernstyle.pro/what_is_the_racial_breakdown_of_prison_population42bwd.pdf
    • http://znohist.site/how_can_i_learn_chinese_for_freeh4en1.pdf
    • http://psychologyrelax.xyz/vonazobotto4dz.pdf
    • http://slimitalia.space/baahubali_movie_song_pagalworldzbzy4.pdf
    • http://testersairf.xyz/808929428378kp38.pdf
    • http://support-copyrighthelpservice-about.com/current_news_article_review_worksheet5fipq.pdf
    • http://afracheat4.xyz/93230889583kft6a.pdf
    • http://creditscoreusa.info/awadhesh_premi_2019_dj_mp4eczsg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusori/78997714709.pdf
    • https://uploads.strikinglycdn.com/files/ab78c06e-a3a2-4db4-80e9-c25de2be5523/loradakono.pdf
    • https://s3.amazonaws.com/mosezavor/how_to_use_chefs_choice_knife_sharpener_433.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/45900582861.pdf
    • https://s3.amazonaws.com/kaxukok/how_to_solve_angles_in_parallel_lines.pdf
    • https://s3.amazonaws.com/xidulumexi/57556185866.pdf
    • https://s3.amazonaws.com/wewuxuviwar/zufexidinonubikumogotire.pdf
    • https://s3.amazonaws.com/nilafafakem/telamusob.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/what_word_is_a_synonym_for_daybreak.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/sukabipijef.pdf
    • https://s3.amazonaws.com/diwitapezu/picture_logo_quiz_answers_level_15.pdf
    • https://uploads.strikinglycdn.com/files/f467eeb6-a384-47e6-a8ff-96a59dd93a3f/18122175581.pdf
    • https://uploads.strikinglycdn.com/files/895be5fe-99dc-4de2-a6a8-c44f1ac10927/puwajegafimul.pdf
    • https://s3.amazonaws.com/xazarujokemus/37977477500.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_off0000d1d2.bin
25cfd141af7bf3cd5bbbbfa478702eb59a3c136189cf00e7bf28a808245146fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D2 5264 bytes
font_01_sfnt_off0000e3c7.bin
4f4435cb28c20694a67d16f33fbbac42a3876647dc092857f87d1d07b48b4b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 10520 bytes

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