Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3991f4277a0f62…

MALICIOUS

PDF

173.8 KB Created: 2020-10-13 05:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e010b98de02173516dc0de52e588153c SHA-1: b740b55859dcb792e8cc76e19268a10c6d3c1b4e SHA-256: cf3991f4277a0f627c16370f000034cc320ebe3525b28212c170f100aba8e33c
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=corea+del+sur+informacion+pdf In PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/monobokibarodivuj.pdfIn PDF document text
    • https://site-1040881.mozfiles.com/files/1040881/45574214295.pdfIn PDF document text
    • https://site-1043296.mozfiles.com/files/1043296/63273308340.pdfIn PDF document text
    • https://site-1041501.mozfiles.com/files/1041501/gerujute.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/70063708586.pdfIn PDF document text
    • https://site-1048200.mozfiles.com/files/1048200/wenitegugefubitujubukaf.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/ranife.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/biwal.pdfIn PDF document text
    • http://files.overcaffeinatedcode.com/uploads/1/3/2/6/132681665/zisimig.pdfIn PDF document text
    • http://files.muscularinjuryspecialist.com/uploads/1/3/2/6/132681891/kixuki-tupiwadekisi-wibagat.pdfIn PDF document text
    • http://vopogilo.awarenessties.us/uploads/1/3/0/7/130739664/fitelejalasoxebo.pdfIn PDF document text
    • http://xigogu.funfetti.co.uk/uploads/1/3/1/3/131383493/9785638.pdfIn PDF document text
    • http://files.trailbalzingamstaffs.net/uploads/1/3/0/9/130969310/4babdbc0.pdfIn PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/38647252534.pdfIn PDF document text
    • https://site-1048486.mozfiles.com/files/1048486/93614790538.pdfIn PDF document text
    • https://site-1044009.mozfiles.com/files/1044009/kanudojo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA48 37352 bytes
SHA-256: 9c765ed5cffd1eaae0849b5426e8f03ed02f1f4df9a9c9cf9f2772dfed0f9f4d
font_01_sfnt_off00026bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BCD 5208 bytes
SHA-256: b0539d4506d8a32de1619d3b5e3bce39a816146466611594be626f90f38aa182
font_02_sfnt_off00027d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D68 12900 bytes
SHA-256: 88a752058d8934d49525b8109deb3d05498e3a885568ca1d634f5a391520a5ae

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