Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f31773f2f7be413…

MALICIOUS

PDF

72.7 KB Created: 2021-02-20 07:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fa1c14c0561da9fbe6f8df9ccacc6635 SHA-1: cbad6cb4836b2557f28e4b6a67d19cd632c0d124 SHA-256: 2f31773f2f7be41332e48bb6b41c2732a2ca788ccc59ab07bb17e253b176a0f9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wb?keyword=best%20short%20stories%20pdf%20free%20download PDF link annotation
    • https://cdn.sqhk.co/bafuberudod/Zocibgj/playstation_video_android_tv.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/nivoniriwane.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/1v7wgdL/xemume.pdfIn PDF document text
    • https://jitezawedum.weebly.com/uploads/1/3/4/6/134688152/3986687.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/hcgfKjh/airplane_movie_quotes.pdfIn PDF document text
    • https://wirorovikematu.weebly.com/uploads/1/3/1/0/131071137/xogara_bilib_gejiripo_dinoso.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/2547673.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/25197855194.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/167100.pdfIn PDF document text
    • https://rorogujelid.weebly.com/uploads/1/3/4/7/134702732/584e6d767051cf.pdfIn PDF document text
    • http://freshmind.net/51691064442xarqt.pdfIn PDF document text
    • https://melinifijegor.weebly.com/uploads/1/3/4/2/134265386/618cec552435e9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosukijabadizi.epizy.com/astro_a50_xbox_one_headset_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/synaptic_package_manager_add_ed_packages.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/violin_sheet_for_beginners.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 5268 bytes
SHA-256: dcb7e0c22f69b8163c102cb9dc9e79e22e2852ad915abefa0e99f816c4756c13
font_01_sfnt_off0000f2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 10164 bytes
SHA-256: 756ff20cf64a1a5db68c83e53f4377648f6bbdf490f1266c834fb5302e55781c