Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b0b5d911e0b808…

MALICIOUS

PDF

49.1 KB Created: 2020-10-15 07:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0880dc38ff6355a7b4709553554f5a02 SHA-1: 1b3f891bfd5afb357af1ab453419d3c3e16f5d63 SHA-256: c5b0b5d911e0b808881857543d1585090cac057f5e49134167e2f04c5294916c
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://gettraff.ru/pify?keyword=fuerteventura+bus+timetable+pdf In PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/mekuluvosapeju.pdfIn PDF document text
    • https://site-1043803.mozfiles.com/files/1043803/xeterivizilen.pdfIn PDF document text
    • https://site-1044300.mozfiles.com/files/1044300/lizigalixojunofabosirona.pdfIn PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/3969176766.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/baxuvesot-nizavij.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/500b6.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/zepirumigawebu-viribelumep-jigobixesinura.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://site-1043485.mozfiles.com/files/1043485/free_blank_us_map.pdfIn PDF document text
    • https://site-1048559.mozfiles.com/files/1048559/ximomowin.pdfIn PDF document text
    • https://site-1048529.mozfiles.com/files/1048529/52466736295.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/gironu.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/138303.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/8f4b4e8d1a.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f875493bf72f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8789f0354cf.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
    • https://uploads.strikinglycdn.com/files/a14af763-d44b-4f47-b8d5-8d8e05de5ea0/nimeligulile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bc1e3d-ca87-465d-a4be-ddf191b0de4b/xawudoxovojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3298e86f-d780-45d9-a1cd-69b5ef8310fd/21898724384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb02646-6529-4f65-9c12-c7d1db675d0e/rakalibewuxonenafesuzar.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_off00006c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C25 5116 bytes
SHA-256: 7560b129f0f5fbee1562041fef9da4d101ebfc1d4ba0dbb9c3932e9cd63e8286
font_01_sfnt_off00007d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D67 13824 bytes
SHA-256: 976d6ed2d3bc9915f4772d99c05612c1de51bb2164032c4864abe0bb14496866
font_02_sfnt_off0000a937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA937 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3