Malicious PDF — malware analysis report

Static analysis result for SHA-256 a482931a62afd2e9…

MALICIOUS

PDF

67.8 KB Created: 2021-03-10 14:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4230452d1df4dc3150b3d6fa978c78c9 SHA-1: 759f56e21d2ddf7796a261f3b017e4a4c606b518 SHA-256: a482931a62afd2e9407b1f970f5c03412e8cb58055a712dfcfe6392f098e40b2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a domain associated with potentially malicious activity. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to educational content, likely to trick users into visiting the malicious URL.

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/award?keyword=dividing+polynomials+by+binomials+worksheet+pdf
    • https://leduxuma.weebly.com/uploads/1/3/2/8/132814900/wulidaz-kulojejikuwav-gumasajar-tajesonitagu.pdf
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/dowerazag.pdf
    • http://lovelyhouse.online/sesozavufezuludovogcwd7h.pdf
    • http://slimerecipe.org/cover_page_apa_guidelinestvquy.pdf
    • http://opt05.ru/unit4_excelerator_manualzz338.pdf
    • http://wirelessinfo.ru/35399767780jw54n.pdf
    • http://topfrag.rip/new_orleans_tattoo_ideasbefgm.pdf
    • https://xusolufazajone.weebly.com/uploads/1/3/1/3/131383045/xudibipera-gezajo-kuvalaga-pusujavitozora.pdf
    • http://mavito.online/mimikumq8hb.pdf
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/ridizumaf_kirojakajutikul_kaxafu.pdf
    • http://bupatinewesep.66ghz.com/tamil_album_songs_list_audio_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gonoluripep.rf.gd/how_to_use_slimline_digital_scale.pdf
    • http://pumajuxav.rf.gd/check_writing_software.pdf
    • http://jasikadavasa.epizy.com/angina_de_pecho_cuadro_clinico.pdf
    • http://sajidot.epizy.com/budoloxasuputeselawe.pdf
    • http://putojoner.rf.gd/72736986374.pdf
    • http://nonilugubosaz.epizy.com/88483426865.pdf
    • http://kozusabupo.epizy.com/infection_in_pregnancy_guidelines.pdf
    • http://sevidimifab.epizy.com/zuxejubame.pdf
    • http://wuzuruwevirelu.rf.gd/34065789329.pdf
    • http://pawutewitozi.epizy.com/nibutegabovow.pdf
    • http://kulaxukiju.epizy.com/physics_for_scientists_and_engineers_3rd_edition_giancoli.pdf
    • http://zapesezowu.rf.gd/genetics_and_evolution_class_12_notes.pdf
    • http://fokezazonof.epizy.com/background_music_for_ppt_slides_free.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_off0000cc87.bin
c97bf096c160ac7988d0654837e501930369b62528d0178bdb31ef032d634c40
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 5912 bytes
font_01_sfnt_off0000e099.bin
c9e53008aa50633b89bf06ed03b6585a62c15a1e412660bacde06eb14e7da46c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE099 9604 bytes