Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f82be861b364eb7…

MALICIOUS

PDF

72.1 KB Created: 2021-01-18 12:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b88e8c8724d4b538f07ff8ff555ac8de SHA-1: 1280e1d7d7627c4e3ba03467b1ae72e2b19e581d SHA-256: 4f82be861b364eb7b329386e8a03d4148149d3798b54c141b16a38d087cfcccf
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/aws?utm_term=solving+exponential+equations+and+inequalities+answers PDF link annotation
    • https://site-1180237.mozfiles.com/files/1180237/conducting_materials_notes.pdfIn PDF document text
    • https://site-1181071.mozfiles.com/files/1181071/charge_apple_pencil_without_adapter.pdfIn PDF document text
    • https://site-1251664.mozfiles.com/files/1251664/piluwosozizikenam.pdfIn PDF document text
    • https://site-1174602.mozfiles.com/files/1174602/xazikad.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/ieiejgx/77790883483.pdfIn PDF document text
    • https://fuwowomazusora.weebly.com/uploads/1/3/4/0/134000162/kajolox.pdfIn PDF document text
    • https://site-1168352.mozfiles.com/files/1168352/coin_collection_storage_ideas.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/a5bf877bea23.pdfIn PDF document text
    • https://nexuragero.weebly.com/uploads/1/3/4/7/134751893/2bf30be465d4.pdfIn PDF document text
    • https://site-1177257.mozfiles.com/files/1177257/24477503618.pdfIn PDF document text
    • https://site-1178858.mozfiles.com/files/1178858/39430749737.pdfIn PDF document text
    • https://site-1168340.mozfiles.com/files/1168340/cht_c_chloroform.pdfIn PDF document text
    • https://judunelikirolo.weebly.com/uploads/1/3/4/3/134375477/8102535.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/chairside_assistant_dental_exam_study_guide.pdfIn PDF document text
    • https://site-1171720.mozfiles.com/files/1171720/remix_omg_dolls_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 5576 bytes
SHA-256: 7d3528b734f282db4a0c9c1d2f8f7fc8a5b2d8fe5e15083def33f8e613fd62e3
font_01_sfnt_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 11524 bytes
SHA-256: d52fb203c125e81c2411e9e1b69c3a31e59c6274650e52e9387fb0c0be8cc71c