Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f76c7a5ef135c2e…

MALICIOUS

PDF

64.2 KB Created: 2021-02-11 20:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 48332040a25f1bc92fa0ddc2bf968dfb SHA-1: 6ed9a5d21cc6d4a20b35aa29046da40f7861ff1b SHA-256: 4f76c7a5ef135c2eba00bb8888103332276a9d0664462ec5be4b1dff784c20a0
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=d%2526d+oni+names PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450351/normal_5fe7d51dd1d93.pdfIn PDF document text
    • http://pumexewutide.22web.org/arris_tg862_firmware.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fea05df78991.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/vawane.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370785/normal_6001cea71c7c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fe87242e447e.pdfIn PDF document text
    • http://zekoselu.22web.org/contemplate_mentally_crossword_clue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459035/normal_600898daf15db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5febf83d61f44.pdfIn PDF document text
    • http://natiral.space/integrated_chinese_workbook_answers_4th_edition9rfhc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://meridupomosim.epizy.com/47343727035.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/filmora_video_editor_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/moxud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB863 3484 bytes
SHA-256: 8e9e82eeee626ae3cf90455cd7f2f0b0f68513c2b5b541aa2122e86371f46d9f
font_01_sfnt_off0000c3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CF 9860 bytes
SHA-256: 7fdf3bd2e21df5680c39ca0a6e100af3ccedb44e0d91ff7827351f0f274dae87
font_02_sfnt_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3