Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b368543e343e257…

MALICIOUS

PDF

38.3 KB Created: 2020-10-06 18:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: cf45f923cddd161beca17d929dbc8e5d SHA-1: 713c28109830ed59c1d6e09f29cdf769c289a618 SHA-256: 0b368543e343e257f9a44af562ecf9f13eb127678bba1bc3daa08802c5cd8f85
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://ttraff.club/pify?keyword=los+pollitos+dicen+translation In PDF document text
    • https://site-1038944.mozfiles.com/files/1038944/86307125041.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/71873646486.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/9462727162.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/50310501588.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/55488277607.pdfIn PDF document text
    • http://gosim.mylittlestrongone.com/uploads/1/3/0/7/130739509/larorakib_velexuni_labemirejopilo_tewosos.pdfIn PDF document text
    • http://files.starlapps.com/uploads/1/3/1/4/131438474/5035045.pdfIn PDF document text
    • http://files.mbtaiji.net/uploads/1/3/0/8/130873851/1363479.pdfIn PDF document text
    • http://fafilaz.ptcwyo.com/uploads/1/3/1/1/131164250/ffde5f4b187b.pdfIn PDF document text
    • http://vinaxerem.istsportstherapies.com/uploads/1/3/2/6/132695832/7078385.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/pewogowilesatijasetut.pdfIn PDF document text
    • https://site-1042892.mozfiles.com/files/1042892/mubokiro.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/bonotivugafa.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/65992644881.pdfIn PDF document text
    • https://site-1038552.mozfiles.com/files/1038552/29792088782.pdfIn PDF document text
    • https://site-1040100.mozfiles.com/files/1040100/walomalinukodakilikafum.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_off000055d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D0 5008 bytes
SHA-256: d73aa8955440823c9c2868efb238df08f018e766fd05f541cd317aa1dc21c4f6
font_01_sfnt_off000066e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E5 11048 bytes
SHA-256: cad89e67f7c2305cf602b93ca21cfeae4a6c4e701f7d16543008d42523767220