Malicious PDF — malware analysis report

Static analysis result for SHA-256 36215e212054a139…

MALICIOUS

PDF

72.9 KB Created: 2021-03-25 15:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 64be64f3a9f1dbb07eb8873094a11b46 SHA-1: 9d96fc92b4eaa287a5b72889ae4dab56ab9ece0a SHA-256: 36215e212054a1397064119d15a073274f0928e8656c129872ea0b9488c32d8d
104 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'leonvi.ru' suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to deactivating software, likely a lure to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=how+to+deactivate+deep+freeze+with+password PDF link annotation
    • https://cdn.sqhk.co/juwafajem/hdoMhjU/13230682906.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/heLVdjh/nhl_21_xbox_one_pre_order.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/jc4EAji/sedale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_6025b958c24cf.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/hME1hhS/xixonug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5ffddd86b147d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_602465cb7b681.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/C4TjiEk/sipivefojixazewa.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/bruchgleichungen_bungen.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/d8a12900-0bff-4192-af4b-1f38826a226a/nitifamobanefer.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/fonimezojafemumesoxexuzit.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/bariyan_ashiq_mizaj_akhan_terian_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61fb8437-cfdb-47d0-8a47-95dde44a7dad/como_saber_quando_devo_terminar_um_namoro.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/basic_computer_questions_with_answers_for_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/kawadotenonej.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/firewotimusaziwu.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/jasogisapuripa.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/was_the_3rd_estate_started_french_revolution_and_wrote_1st_constitution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbea1d2d-5096-433e-ad9c-8ff648f4f77a/xepajiduz.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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5372 bytes
SHA-256: eb2a10940c6a885bd7826abaa54b4151763fed614636a277fc2782748d4d5263
font_01_sfnt_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 10456 bytes
SHA-256: 9511d151a057071629df810bc2f019d730abed59e92c42c384ac37d1b4bfda0b

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