Malicious PDF — malware analysis report

Static analysis result for SHA-256 d220ca024aa2d505…

MALICIOUS

PDF

77.9 KB Created: 2021-02-21 02:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 56dd4b0d8488397adbcece89cbaf92ec SHA-1: 9a1b9758f1b0749721ace352f7778dc715671c10 SHA-256: d220ca024aa2d505f0ee1387eddb50445546b14177a46a72de8cc1cba914b01d
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/aws?utm_term=place+value+activities+for+2nd+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366357/normal_601ac20639422.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/fGDjgjb/gafifuwesojipidix.pdfIn PDF document text
    • http://social-whisper.ru/25th_wedding_anniversary_images_freew3j9u.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/jhB5y8x/47409155398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fefcd45acfa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fd63c36bb15b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_600871655e076.pdfIn PDF document text
    • http://antonioita.fun/9120061522080ul0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fcc942f17f2b.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/ajax_post_request_fileewm1y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_601a152868754.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/j8hajeQ/best_30_day_home_workout_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xekawiba/ighxfMr/xonofisudobaritur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fekazudabo/seta_baricco_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/guvilumepamijufikarexomi.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/13833663723.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/vetozekanuseka.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/vewopiponevedadexibif.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/lowanivotenuki.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/nirasosepot.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/blocking_calls_on_android_tablet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 5264 bytes
SHA-256: 7953ac94b0f655747ec33cfac63f923ac1709268325662461ec401517ad9fbda
font_01_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 10532 bytes
SHA-256: cac7bb37c43190ab348b75c3338a4401d7b80510e79ac87610f3fed324359450
font_02_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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