Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb664af2626b3a8f…

MALICIOUS

PDF

76.9 KB Created: 2021-03-25 23:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d4445e218d57017d0e44b252721d4ce3 SHA-1: cfec9a2284ed1987d55cf50e2058cd8cc75064ab SHA-256: eb664af2626b3a8f1e0decec388c44c6f8def167ed6d9055ba4d43165844285e
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is identified as malicious by ClamAV and ML classifiers, specifically flagged as a phishing attempt. It contains an embedded URL that acts as an SEO redirector, likely to facilitate the download of a secondary payload. The document body, though heavily obfuscated, contains references to 'technical manual' and application details consistent with a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/aws?utm_term=m1083a1+technical+manual PDF link annotation
    • https://cdn.sqhk.co/kavejufa/cbBrjaq/banco_do_brasil_americas_orlando.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/7hhNhhF/dukubelimowafipisalizofuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd8564bcd8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_603a6b8b30820.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/fhhjhje/among_us_free_online_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/oggihie/business_management_chapter_12_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/kLqgi5o/cute_couples_costume_ideas_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/NOjejce/99781201924.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/17109310714.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/hdhf2ii/bisoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_5fd79cef4cbef.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/qgghgHl/fast_driftstalle_oecd.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/19ab0acd-031e-4980-a41d-978ff356be48/jlab_jbuds_air_executive_charging_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1dcc78-8e92-4686-8ae0-8a716220b6a2/kalaponiwelobojogeram.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/leworidesex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b888ca8-c1a2-45ca-9575-5ff23db5eec5/runipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61685d93-ea60-4e2b-a88e-2e6a7bc9a5f2/how_to_change_transmission_fluid_focus_st.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/fumurer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ed5fab-69be-4ee5-beb9-5499ec5f2262/nco_guide_board_questions.pdfIn PDF document text
    • http://jarepumemaxi.onlinewebshop.net/26688685928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f17ea6c-c9fa-48bc-aa30-f4256762b224/tupututuwolu.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_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 5320 bytes
SHA-256: e5c01f6b94336f7f284e25a8ca5ea5774509f9d319723ba2a67b998f4d8396a3
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10820 bytes
SHA-256: 0d7a78724f07251d6795fc26245959cfb94e5f7831c84d93c6fcf919d881df17

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