Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe984c1981d99a0…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 15:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aa56f54b0fd75877875d1c9c76458ce SHA-1: 298ca7a9c73744143a98cb7142a8fb7ba95bb9d9 SHA-256: 7fe984c1981d99a0ccca6bb7e658cb4031f13aff3a2b4ea0124ec6d366bcd839
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains external URIs and embedded URLs that point to potentially malicious domains, suggesting an attempt to trick the user into downloading a secondary payload. The presence of a visual download button heuristic further supports this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/123?utm_term=lesson+plan+template+for+homeschool
    • http://bonmarket.site/42435492395bvteu.pdf
    • http://voirlo.xyz/what_happens_if_you_cant_pay_a_judgmentl56vg.pdf
    • http://gomesuzos.mypressonline.com/70247372024.pdf
    • http://bejawutipage.mywebcommunity.org/how_much_does_khan_academy_sat_prep_cost.pdf
    • http://theporte.xyz/dodopanapuxawetozaauz0r.pdf
    • https://cdn.sqhk.co/dugubupa/jTFibia/40620793303.pdf
    • https://cdn.sqhk.co/kedilexele/heihgjx/sexexatir.pdf
    • https://cdn.sqhk.co/rifokinimito/jbjahdm/39671720038.pdf
    • https://cdn.sqhk.co/nuvaratuji/ShijhaL/zenimafipuzi.pdf
    • http://tamakedesununod.mywebcommunity.org/84055920715.pdf
    • https://cdn.sqhk.co/vovigewuva/WitwEic/employee_engagement_survey_template.pdf
    • http://zhk-samolet-krasnodar.info/66294029515xl0kj.pdf
    • http://mibilivo.scienceontheweb.net/jikowabi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/edc303c2-b037-426d-9aed-773a533cbffb/what_is_default_password_of_skyworth.pdf
    • https://uploads.strikinglycdn.com/files/176c7628-b36b-48e2-9b23-19bb3e97ef77/how_to_turn_on_stove_pilot_light.pdf
    • https://s3.amazonaws.com/figugipopar/39036685394.pdf
    • http://belibivizonojo.myartsonline.com/runusozoxarojoroso.pdf
    • https://s3.amazonaws.com/bidurudilidujug/reriloxugasevezi.pdf
    • https://s3.amazonaws.com/bomupi/vocabulary_workshop_level_b_answers_unit_1.pdf
    • https://s3.amazonaws.com/fekaduvopigab/chef_s_choice_knife_sharpener_manual.pdf
    • https://s3.amazonaws.com/xenavuxa/block_ads_android_games.pdf
    • https://s3.amazonaws.com/xugigabitulu/latusisip.pdf
    • https://s3.amazonaws.com/wujafivabipo/32368158682.pdf
    • https://s3.amazonaws.com/jevopemosod/lullaby_of_woe_sheet_music_piano.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_off0000ee2b.bin
a009512412f13b51c5d5c6bc78424d38c92fb7d8a32ca56b81c43e9b1de87de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 5196 bytes
font_01_sfnt_off0000ffae.bin
e7bf3455b48b848beccebcd8228327d4af7ec46aa8be94db29a1c4aac1943909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 10644 bytes

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