Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8093ab214deb36a…

MALICIOUS

PDF

45.5 KB Created: 2020-10-11 00:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31d801916336e6fafe4a6b91769e0b90 SHA-1: 7fd8ba50eabed9db05031c4e0f9e4f2f61b89830 SHA-256: f8093ab214deb36aabfcd7bd44cab6965b270ee6e821ddd784fab6ab6040fd70
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=neverwinter+omu+hunt+mark+locations In PDF document text
    • https://site-1042787.mozfiles.com/files/1042787/kofoninapofipeteb.pdfIn PDF document text
    • https://site-1038738.mozfiles.com/files/1038738/soxinitatix.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/79385857081.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/fitebapetaziwoperilaxo.pdfIn PDF document text
    • http://files.mckeenfund.org/uploads/1/3/1/4/131409236/botezixafoleri-muwemegebimevo-sogif.pdfIn PDF document text
    • http://xaben.englishwithcleek.com/uploads/1/3/0/8/130813554/4f73a502e1.pdfIn PDF document text
    • http://files.cathysage.com/uploads/1/3/0/9/130969097/7726430.pdfIn PDF document text
    • http://juteti.kaitlinbellamy.com/uploads/1/3/2/7/132740494/fetujavosofobe-lugomonojedav-morujorogem-dufuzovizuxeti.pdfIn PDF document text
    • http://seboxaw.spicedforyou.com/uploads/1/3/0/7/130776716/birog_jozedolujivopep_dedewoferete_majomotexef.pdfIn PDF document text
    • http://files.michaelmoore.studio/uploads/1/3/1/3/131383775/kulipojuxufix.pdfIn PDF document text
    • http://files.nasafacs.org/uploads/1/3/2/3/132303269/36716e.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/81966045338.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/nifuj.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/36000431289.pdfIn PDF document text
    • https://site-1038948.mozfiles.com/files/1038948/72777610731.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/loravifejojarigojol.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_off000071f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F3 5224 bytes
SHA-256: c94acba9c83d0ae1dea93ec545f5817aad72e9806295c667c5e18a2023c194d2
font_01_sfnt_off000083a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A3 11008 bytes
SHA-256: 2b75675faec453fbbccb012601b4452cc1f22c7b5377c66a48107813f7bd8b25

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