Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ab95bf38c039e1…

MALICIOUS

PDF

85.0 KB Created: 2021-03-30 04:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 69547983dd325af691b96a561e156809 SHA-1: d6cfd955d8d17022b6753aac327fb8c0da037050 SHA-256: 29ab95bf38c039e1190e4b3eb3d4320f25d7fe093f68c30dc1b741336fc690f2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to free software templates, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/aws?utm_term=logo+reveal+premiere+pro+templates+free+download PDF link annotation
    • http://jejunobu.iblogger.org/what_is_the_story_woman_hollering_creek_about.pdfIn PDF document text
    • http://bazufilonunax.iblogger.org/51217947076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414852/normal_5fe37cb24469c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_6032e4255d247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_60121653c451b.pdfIn PDF document text
    • http://tufepuwaw.iblogger.org/58265820049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aeb1f43-7cca-4e83-997e-54f190f19ada/zedewuduze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a582b3c-5608-44de-8aea-4b87a741f216/how_to_use_educational_psychology_in_the_classroom.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/how_much_does_a_washer_and_dryer_set_cost.pdfIn PDF document text
    • http://pejaxuvotovu.rf.gd/english_parts_of_speech_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/42518078155.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/81969502790.pdfIn PDF document text
    • http://pavebutom.epizy.com/bezazajuxofodezasukivet.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/assamese_song_video_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c6ad72-8f67-4dc3-90df-945feb5389ad/87078719840.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/badger_insinkerator_5_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/american_idiot_full_album_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/enlaces_quimicos_para_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b0c53e-a4d3-4056-b915-7bca990cb9b6/famuxixedikolinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6e1eff-0659-48c9-adfa-4201b3a26fef/mesa_boogie_mark_iv_combo_review.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/58887121758.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/2471249525.pdfIn PDF document text
    • http://gibovutapobubu.rf.gd/dead_space_3_awakened_ita.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_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 5452 bytes
SHA-256: 6abf8a7a737594b3c0c49d229daf9edc48febd08b7f84f6a85210c39d9fd3f7d
font_01_sfnt_off00011fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB6 10736 bytes
SHA-256: a39ce1c43e3011231c73e66fd880b93fbbc69988d85342e63138f910810b4fee

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