Malicious PDF — malware analysis report

Static analysis result for SHA-256 895f7a7b3565bab8…

MALICIOUS

PDF

79.6 KB Created: 2021-03-10 03:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dca2c572e52bb96b927e31abdbb6dd6 SHA-1: bf0ddb13ef808b68abd271f9055ad886765d30ba SHA-256: 895f7a7b3565bab8c5ed645122c563af5186653399b02ba6d658b458a7455520
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a secondary payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to tool maintenance, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/aws?utm_term=how+to+change+blade+on+skilsaw+miter+saw
    • http://lifeit.pro/159674393894b3e2.pdf
    • http://50off.pro/tippmann_model_98_pricer6o7u.pdf
    • http://jsexj.fun/the_food_vocabulary_word_game_answers_1731fv7c.pdf
    • https://cdn.sqhk.co/retobumoki/jhmhl7L/83657928641.pdf
    • http://tactical-jacket-sale.shop/42633528662s6rll.pdf
    • http://ontrade.top/82297759538q2bnw.pdf
    • http://groby-ritual.online/84485474693rj5ws.pdf
    • http://ridaxaki.mywebcommunity.org/hp_photosmart_2610xi_hard_reset.pdf
    • http://pearhaidhr.fun/49029500629thfna.pdf
    • https://cdn.sqhk.co/xadowififux/giibjgf/pencil_christmas_tree_hobby_lobby.pdf
    • https://cdn.sqhk.co/vutenugade/i9gg6hd/sirujamiludekokitodamim.pdf
    • https://cdn.sqhk.co/medujebukoma/fjdEhb0/ludo_king_online_game_free_download.pdf
    • http://rimka.xyz/does_a_2005_nissan_murano_have_a_cvt_transmission0oz5p.pdf
    • http://freshnatur.fun/zenazolobemugedezotnr2s8.pdf
    • http://allroadkamchatka.ru/4.3_mercruiser_timing_specs4x3cf.pdf
    • http://gsmall.space/cardiovascular_system_structure_and_functionqkes9.pdf
    • http://solent.bar/79412961252z6ikp.pdf
    • http://jurojegame.getenjoyment.net/39408317132.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_fed637d4570d465cbb014484d7562ecf.pdf?index=true
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_5ce55ea2a5fa4f25b3cb6ab84b4c52fb.pdf?index=true
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_7da373719ba74f3480db8fd6650da8a3.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_off0000fa2d.bin
c81b6d3c18c6204e974173da9958a8750e075114cf08234ad5f07f9a54968494
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 5612 bytes
font_01_sfnt_off00010d20.bin
9eb414f88d69aa6104672d9cd39bedc39609d5221b9071d72876d5928e9a03c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D20 10536 bytes