Malicious PDF — malware analysis report

Static analysis result for SHA-256 f959c4c314ff9e78…

MALICIOUS

PDF

77.6 KB Created: 2021-04-08 00:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8235583c413cf8f617d820ccdbbd069d SHA-1: 5e7345dc7a28c6ec0eb9d9ca62ffaa750cc64e33 SHA-256: f959c4c314ff9e786b648e58e9345788d7be3f8cefdda0242b863bd304832b26
96 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=android+picasso+circle+image', which is likely a phishing or malware distribution URL. The PDF structure and embedded content suggest it's intended to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/123?utm_term=android+picasso+circle+image
    • https://cdn-cms.f-static.net/uploads/4385859/normal_604046a6e379b.pdf
    • https://cdn-cms.f-static.net/uploads/4375339/normal_6040bc304a4ba.pdf
    • http://vukenetux.22web.org/books_to_read_before_you_die.pdf
    • http://koolmaxt.online/38323455770i3bbw.pdf
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5fd60b9c914da.pdf
    • https://cdn.sqhk.co/letijefa/pRVjhjj/venta_de_recargas_claro_nicaragua.pdf
    • https://cdn-cms.f-static.net/uploads/4502246/normal_5fd3d2a628054.pdf
    • http://jovuzutijokene.iblogger.org/15990601236.pdf
    • https://cdn.sqhk.co/boxewemutox/jfQMNia/1491426214.pdf
    • https://cdn.sqhk.co/dixazotunu/gMogeAG/xuzojedujaki.pdf
    • https://cdn.sqhk.co/torazanopuni/On0ifgf/42707740535.pdf
    • http://salonhq.xyz/timamarelm556c.pdf
    • https://cdn.sqhk.co/zizenozi/shegdgj/vomiting_after_eating_sugar.pdf
    • http://freshka.fun/triphasic_bbt_chartnxsre.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://garapaf.epizy.com/fluid_replacement_therapy_nice_guidelines.pdf
    • https://s3.amazonaws.com/fekaduvopigab/blocchi_cad_dwg_free.pdf
    • http://firotiz.epizy.com/tasobakojemexax.pdf
    • https://s3.amazonaws.com/sezewu/usda_dietary_guidelines_saturated_fat.pdf
    • https://s3.amazonaws.com/warapagefasovi/structure_and_function_of_hemoglobin.pdf
    • https://uploads.strikinglycdn.com/files/b7ad45d0-fb11-43d1-aafe-4c382bbf9ba2/gofamimupasokotuzoj.pdf
    • http://pejefovad.epizy.com/xujobopesinaxurepige.pdf
    • https://s3.amazonaws.com/gezetega/fundamentals_of_machine_component_design_5th_edition_solutions.pdf
    • https://uploads.strikinglycdn.com/files/7f7667ed-ac44-4997-9b5c-0b15d21cb7b4/13140737434.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_off0000e28d.bin
d32d6c665ebcfbf926899af9d665394a19d5e52bd6cc36740b84641e618afea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5092 bytes
font_01_sfnt_off0000f3a5.bin
d414fb8fccd07a7471a136945bdfec7a670e7bda8733830e1f447e8424eb0acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 11036 bytes
font_02_sfnt_off00011988.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11988 4324 bytes

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