Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0fbde263d535dc…

MALICIOUS

PDF

61.0 KB Created: 2020-10-04 00:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4e7a1208a8393c427f1d975c0ac40c89 SHA-1: fdf70ed54afb611dabef49ed0d1e1c064df8678b SHA-256: ac0fbde263d535dc33b3f227ba1950e32f419780297955fc25a6cb84e2c4f993
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/strik?keyword=strategy+and+tactics+magazine+pdf In PDF document text
    • http://files.jorgebarro.com/uploads/1/3/1/4/131437229/lokazugitix.pdfIn PDF document text
    • http://files.sixinseoul.com/uploads/1/3/1/0/131070331/faa8c22375.pdfIn PDF document text
    • http://files.tristatemodelers.org/uploads/1/3/0/8/130874189/9104841.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/jopovepowarogebejulin.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/xesip.pdfIn PDF document text
    • https://site-1042832.mozfiles.com/files/1042832/jizinuzenetuxogejis.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/94058282237.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/dovamidesifinazojukana.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/xefubelilizutebuxetoxaluk.pdfIn PDF document text
    • https://site-1038622.mozfiles.com/files/1038622/90105252690.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/98843149628.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/zigutivikuwu.pdfIn PDF document text
    • https://site-1040426.mozfiles.com/files/1040426/48854794272.pdfIn PDF document text
    • https://site-1040298.mozfiles.com/files/1040298/43316175922.pdfIn PDF document text
    • https://site-1038345.mozfiles.com/files/1038345/gupalugef.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_off0000a201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA201 5696 bytes
SHA-256: 40291bbdd7aa28bbabe8ee6140495103643f0c4a227e244904b581d32a2aa23a
font_01_sfnt_off0000b56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56B 16040 bytes
SHA-256: 91485ccc65b2c4410022a76620c1b0da55bbf541cf162aebe73d800a4883a7c4

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