Malicious PDF — malware analysis report

Static analysis result for SHA-256 f123e097355eb38c…

MALICIOUS

PDF

113.1 KB Created: 2021-02-23 11:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 63e3e1c3daa5a8ada92196c26e59afc3 SHA-1: c5bee18ccf542703472e7fff6ad5970d04625945 SHA-256: f123e097355eb38c0a1db8ef98516475228fc89ce25e2a370429af875affec92
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, with heuristics indicating the presence of an external URI and an urgency lure. The embedded URL 'https://seumenha.ru/strik?utm_term=wilderness+first+aid' is suspicious and likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to urgency, reinforcing the phishing lure.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=wilderness+first+aid PDF link annotation
    • http://domainlimax.xyz/genestealer_cult_codexhmei0.pdfIn PDF document text
    • http://vamoktin.ru/rigezepewoperevesah1qwt.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/ih1Vfja/home_assistant_devices_reviews.pdfIn PDF document text
    • http://ezfix.asia/53465607406rgh78.pdfIn PDF document text
    • http://devicesprotectionforusers.site/guzirtgqeh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/xiboroniwoxifuma.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/49961946318.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/capitulo_5a_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/full_screen_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/46621482465.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/spotify_premium_crack_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/compartment_exam_datesheet_for_class_12th_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/personal_accounting_ledger_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/lapizegarepaxitikizejawi.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/47295810326.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/beatles_let_it_be_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/edit_split_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/kaleidescape_cinema_one_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/76707987538.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/lukekawipofufapu.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_off00018342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18342 4916 bytes
SHA-256: b9d0ec327e7004372ae49e502a682245eab13b9602e073771e12c9639bbd491a
font_01_sfnt_off00019410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19410 10304 bytes
SHA-256: c2e03bc672606f96ddd0a6f9049a5c7c3bba47c9114429278dea7734d640f2ef

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