Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f53c3126cdcd16…

MALICIOUS

PDF

67.0 KB Created: 2021-03-22 17:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc5567492f705d688127d3a09a9f50c2 SHA-1: def472cfb36928949aa37f139a8d23a63188d884 SHA-256: 14f53c3126cdcd1677ee78bb2d5dbbbce366036db4155f9cb74bc32ebda01870
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'https://jacksth.ru/wix?keyword=whack+the+thief+superhero', which is likely part of a phishing or malware distribution scheme. The PDF structure also contains duplicate object bodies, which can be used to obfuscate malicious content.

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://jacksth.ru/wix?keyword=whack+the+thief+superhero
    • http://myfoxing.online/jeu_de_carte_solitaire_en_lignejxgnl.pdf
    • http://idealica-ordina.site/toro_824_snow_blower_partsa9yjt.pdf
    • http://dalexepegubidi.iblogger.org/67029918100.pdf
    • http://wiinorama.website/scholarship_paper_2019_answerserzbv.pdf
    • http://stankoff.org/34680864413g0hz2.pdf
    • http://pubgmobiie.com/japirawathud6.pdf
    • http://rodsfish.club/23092088336z3bxb.pdf
    • https://cdn-cms.f-static.net/uploads/4459641/normal_602eddf9a5241.pdf
    • https://cdn-cms.f-static.net/uploads/4470679/normal_601f95a097aac.pdf
    • http://naykaryadom.fun/the_illusion_of_life_disney_animation_free_downloadovarq.pdf
    • https://cdn-cms.f-static.net/uploads/4473052/normal_602f8a1ede5fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://robirevi.epizy.com/bluetooth_backup_camera_android_app.pdf
    • http://zudujijikaj.rf.gd/circular_motion_worksheet_multiple_choice.pdf
    • https://s3.amazonaws.com/palikuvexake/herbivore_carnivore_omnivore_worksheet_5th_grade.pdf
    • https://uploads.strikinglycdn.com/files/6c55120d-292c-47a1-862c-0ffa5b217e14/quality_management_system_plan_example.pdf
    • https://s3.amazonaws.com/mubefula/how_to_use_voice_command_on_roku_tv.pdf
    • http://zofikexegugimum.rf.gd/buzivikejokakibubesox.pdf
    • https://s3.amazonaws.com/jivuxo/guidewire_software_inc_dublin.pdf
    • https://uploads.strikinglycdn.com/files/11827d8f-61ed-4742-9fd4-d4cbccfaf594/89810599415.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_off0000c5c0.bin
8a81810670ba13046cacb7f5d84544313797e93f99de5754da622302f541004f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C0 5148 bytes
font_01_sfnt_off0000d752.bin
29173ffab8bc6be1d06b9c73370e0290c3c0146afcee359aa27bf5c69bc6f495
pdf-font-stream PDF embedded font (sfnt) at offset 0xD752 12112 bytes