Malicious PDF — malware analysis report

Static analysis result for SHA-256 841f8c557da42a68…

MALICIOUS

PDF

76.4 KB Created: 2021-05-13 00:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 835ffbf059b18ddaac2a8cf9e22e9e2e SHA-1: 567d9b984f1eea94e6b583a2469e84a37e58dc98 SHA-256: 841f8c557da42a68ca2b5ea8f117774117e53af2b939c544e1ed0a6870f71a3e
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://soxebez.ru/strik?utm_term=crown+pallet+jack+repair+kit', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the presence of suspicious URLs and high detection scores points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=crown+pallet+jack+repair+kit PDF link annotation
    • http://rofamubavuw.iblogger.org/failure_analysis_report.pdfIn PDF document text
    • http://mepuner.iblogger.org/13217221110.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/kison.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/gdhiUwy/gigovibowusijojewike.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/94538759132.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/c6ifiiD/what_is_the_arena_war_career.pdfIn PDF document text
    • http://hh666o.site/ap_calculus_bc_exam_2018pg0j4.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/35820573282.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/ajdziiK/cdor_sales_tax_form.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/hehdhb3/puppy_sneezing_runny_nose_diarrhea.pdfIn PDF document text
    • http://itravelgr.com/advanced_engineering_mathematics_erwin_kreyszig_sladerrgb3r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://digotadegijo.epizy.com/25162191485.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/triangle_midsegment_theorem_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/tamil_animation_funny_videos.pdfIn PDF document text
    • http://roveramo.atwebpages.com/jagimiberubad.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/no_fear_shakespeare_macbeth_act_1_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/6053949198.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/aparichit_2005_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/pugajadiseludinijege.pdfIn PDF document text
    • http://dukejujegu.epizy.com/32884884172.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/tenanemud.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/what_is_the_bolt_pattern_on_a_2000_jeep_grand_cherokee.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/pokemon_go_hub_gengar_raid_guide.pdfIn PDF document text
    • http://jewalozuda.rf.gd/jurnal_anabolisme.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 4884 bytes
SHA-256: 1c91c959cd80e4087b38c00a3a3ebc36dd8ba316d7cc59ca838ce0013282424b
font_01_sfnt_off0000fffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFB 10544 bytes
SHA-256: 4cc574585ece7e75b3f16d51ecd4ca652ff2f7c724a27480dd7201054cd963a1

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