Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a1c6c2498daca4…

MALICIOUS

PDF

73.3 KB Created: 2021-03-29 21:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f0998ede0149bfc9f4cb531919c4e7 SHA-1: 5a041e5f5c79bda0b3578c08fa32cd144adcbebb SHA-256: 31a1c6c2498daca4cd5bbaa480ed6f52a43f4272fc3575091d9c10c04981fc21
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://kuzutuzo.ru/wix?keyword=molecular+compounds+examples', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, appears to be a lure related to search terms, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=molecular+compounds+examples
    • https://cdn.sqhk.co/vosizijanad/hgigeRF/general_assistive_technology_assessment_template_ndis.pdf
    • https://cdn.sqhk.co/rifarako/gcaxygf/lifelafu.pdf
    • http://sutugolewajoz.22web.org/lagu_cilokak_temu_karya_05.pdf
    • http://shoop-fm.ru/dajifojexupanosewaf95.pdf
    • http://insta-sale.site/what_is_the_best_rhythm_heaven_gamev5yhc.pdf
    • http://dusosax.66ghz.com/dickies_coverall_size_guide.pdf
    • https://cdn.sqhk.co/bekutojeke/cVijRgf/35538162093.pdf
    • http://fobexometoparu.iblogger.org/swahili_dictionary_offline_apk.pdf
    • https://cdn.sqhk.co/rinugezig/jTiamhe/mario_kart_tour_hack_no_verification.pdf
    • https://cdn.sqhk.co/bosamame/gcigSty/wordpress_shortcode_login_form.pdf
    • https://cdn.sqhk.co/gelowidabik/aMiddhf/5342578965.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lonozixugixapap.epizy.com/15538870360.pdf
    • http://kijekamazeju.epizy.com/30690544747.pdf
    • http://dafemekadur.epizy.com/37771481949.pdf
    • http://webubekesivamuf.epizy.com/arizona_cardinals_injury_report_week_7.pdf
    • http://lumaradidufil.epizy.com/965006469.pdf
    • http://balazetesu.epizy.com/mamurupuvujanolamesedisu.pdf
    • http://zogemidagubaro.epizy.com/21449980784.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_off0000e1bf.bin
adabbb5951d45ab7d98bf366185b6a1a85d37a3398d13b81ea376c490624059c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5292 bytes
font_01_sfnt_off0000f3b4.bin
39cf4c6fb17c3cd2cb504b2b50601b29029b416450357267006b7a1e5e122f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 10776 bytes

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