Malicious PDF — malware analysis report

Static analysis result for SHA-256 991280e87ee53668…

MALICIOUS

PDF

68.0 KB Created: 2020-10-16 03:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ce486f09c7e179a7b2852e5cc905123b SHA-1: d58ebc290d95d51d9742e4a5a30c1d6d2c390111 SHA-256: 991280e87ee53668b28f013f4dd5afbb674d37273cf208b983fdf94cc1bc98a0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/pify?keyword=procurement+act+south+africa+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f88d01a6d85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f88df362bdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f871bd4008ab.pdfIn PDF document text
    • https://site-1038539.mozfiles.com/files/1038539/tezomowajuxaduk.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/80861659714.pdfIn PDF document text
    • https://site-1039190.mozfiles.com/files/1039190/38579191961.pdfIn PDF document text
    • https://site-1043195.mozfiles.com/files/1043195/wizevavulonofu.pdfIn PDF document text
    • https://site-1038827.mozfiles.com/files/1038827/virinilagijidegoseva.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/galoxuponoxomuzitub.pdfIn PDF document text
    • https://site-1036941.mozfiles.com/files/1036941/ribesoxowumevitoxe.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/46170332364.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/976fb5.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/medore.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/14504c79-e0b9-47ce-bbe6-fca10b80236a/paxesokonovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407be4a8-cb9b-40e7-abc8-6322deee9ca3/keruwowaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dfab97-ebfe-4645-a82f-e0b0998655af/9030061346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2aee6d-50ad-4cab-bab9-f96ebbc0e437/nizum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a0a5dc-50af-40bc-838a-354cbbc4b9ff/83205814121.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1D 5364 bytes
SHA-256: 32a7d37dda83f9a72ad4cc2d9a58554ac00e792a7cee2e6939c89c7cd417035d
font_01_sfnt_off0000c027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC027 10960 bytes
SHA-256: 4b68f234fc37d8ec54b619920236f0e8411738e525bc2ac0c45d67e94e1c6685
font_02_sfnt_off0000e541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 18280 bytes
SHA-256: f88c12c42b6549fe36c1f9c6373a8be8fa7163d2616b377876ca815f562424f8

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