Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcee0098dd682c2d…

MALICIOUS

PDF

85.8 KB Created: 2021-03-31 00:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98a6006edd1a22af5c5639c609991d4e SHA-1: db846881030e770899a48136c0165b9489a26cae SHA-256: bcee0098dd682c2d1a5dd0c78b36130663d121109cfce029ad8a89b874e0588e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to 'seumenha.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=bed+bath+and+beyond+hurom+juicer
    • https://vewekazetuxif.weebly.com/uploads/1/3/1/3/131379326/navezuwag.pdf
    • http://farozemirig.scienceontheweb.net/james_and_the_giant_peach_online_book_free.pdf
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5ff52d2e16923.pdf
    • https://cdn-cms.f-static.net/uploads/4479674/normal_60264482afa86.pdf
    • http://xuritepizib.mygamesonline.org/fugupud.pdf
    • https://cdn-cms.f-static.net/uploads/4375199/normal_6015ff1ab4b31.pdf
    • http://giwosesupalu.medianewsonline.com/b_l_theraja_basic_electronics_download.pdf
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/dutavojed.pdf
    • https://galewijukinez.weebly.com/uploads/1/3/2/6/132695540/lilem.pdf
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/bafewexit.pdf
    • http://konalofasu.mywebcommunity.org/bootstrap_css_tutorial_for_beginners.pdf
    • https://cdn-cms.f-static.net/uploads/4455881/normal_6037006576e76.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e0aa9e72-947f-4ce3-bbe5-2052d91704c7/28686256597.pdf
    • https://uploads.strikinglycdn.com/files/730ab39c-ff09-40fc-aa74-1386080a173a/types_of_paper_textures.pdf
    • https://uploads.strikinglycdn.com/files/390cff6c-15e3-45f7-8462-b5caa4b5d16e/nezigu.pdf
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_8e64569d5c904ffb848ab36ea7537e63.pdf?index=true
    • https://uploads.strikinglycdn.com/files/903da728-1eda-4053-8f8a-59aa4b98d186/life_without_limits_summary.pdf
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_ed92cd8c88a94435a0622869de74081e.pdf?index=true
    • http://roxujewov.myartsonline.com/what_is_the_summary_of_harry_potter_and_the_philosophers_stone.pdf
    • https://uploads.strikinglycdn.com/files/9400a213-3b4c-4546-8305-663fa454eaf3/girl_with_curious_hair_first_edition.pdf
    • https://uploads.strikinglycdn.com/files/0c94107c-c6cf-4baa-b869-02a096310087/std_12_ncert_biology_textbook_free_download_in_gujarati.pdf
    • https://uploads.strikinglycdn.com/files/69e54ff0-9ee9-44cb-aae2-90cfd28df0df/93285656825.pdf
    • https://uploads.strikinglycdn.com/files/3670eda0-bdab-4b87-abd8-ea1e9c289774/how_to_draw_a_dragon_step_by_step_realistic.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010283.bin
15d863120bdfa09b8f0d14bc5de7dc638d797cf060216a10e25493ea5ff7ffc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 5220 bytes
font_01_sfnt_off00011417.bin
7b90e201e6e5e01dff1e387449b7b9f024688c24504dc0d1e038c57f061ae6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11417 11008 bytes
font_02_sfnt_off000139c1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139C1 4324 bytes

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