Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc6a76267e4c2b5…

MALICIOUS

PDF

208.8 KB Created: 2021-02-26 03:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cdba80926a784b7c778a0d97c52ff971 SHA-1: c027bb97a4ea1f9b6005ae921beb3f9a95880bc4 SHA-256: dfc6a76267e4c2b56203ee87769b2341835b1790aa6ba5ac7a9b007deec2d886
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'maypoin.ru', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=iain+m+banks+review PDF link annotation
    • http://sbrf.link/emergent_literacy_for_vpk_instructors_answers2nyp3.pdfIn PDF document text
    • http://merovew.xyz/wazazusozevuwur3wknp.pdfIn PDF document text
    • http://avit0.pro/chopin_trois_nouvelles_etudes_sheet_music7n8wm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5fe85654c5658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_6032cdccdaf8d.pdfIn PDF document text
    • http://deutschebank-meine.com/lunokevarudekutumunel4lu0n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_5fd13503b50a4.pdfIn PDF document text
    • http://wownatural.fun/anganwadi_worker_formivok9.pdfIn PDF document text
    • http://zdsshop.top/gluten_free_snack_foods_listsi8bl.pdfIn PDF document text
    • http://secret-empire.ru/kia_sportage_sat_nav_manual_20160bxp0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_600a038241ca2.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/mixanaz/manual_descriptivo_de_puestos_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/dovifivonubazinalinid.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/financial_literacy_test_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/calculus_volume_3_by_s_narayanan.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/travel_guide_to_new_zealand_south_island.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/55659310647.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_off0002f9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9AE 5092 bytes
SHA-256: d91536fd47c0f80ce58b40992652e3e02e44f99d338fab2a93bd86ef9862b061
font_01_sfnt_off00030afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AFE 12816 bytes
SHA-256: cdae8837a8eaa90fc8d2a03f9b6739474bf5197dbe564c8aa7dd88e990e44332

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