Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a58363939887a4…

MALICIOUS

PDF

65.1 KB Created: 2021-02-19 20:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d78cea75c5bdff175413a8288116599a SHA-1: 3338d8d455bcf9a39baf800156fa23a3b5a5e67b SHA-256: 31a58363939887a4c7625b13495ee69d7b1b1d1173f496a41378bb2e39bec2c3
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://druttle.ru/wix?keyword=perla+preciosa+letra+nilsa+garcia PDF link annotation
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/6695081.pdfIn PDF document text
    • http://wexixexebasober.22web.org/64441025720.pdfIn PDF document text
    • http://bloomwithdeanna.com/vertical_corresponding_alternate_angles_worksheet6p22a.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/cargo_movie_2018_freezvm50.pdfIn PDF document text
    • https://rumefonurotu.weebly.com/uploads/1/3/0/7/130740232/a5dbff.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/muvete-gofavas.pdfIn PDF document text
    • http://chatik85939775.fun/minority_report_brief_summaryi3429.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/fqGNica/nizapukejizadaxa.pdfIn PDF document text
    • http://mon-fortuneo.best/17603705363rwmis.pdfIn PDF document text
    • https://binamakizixevuj.weebly.com/uploads/1/3/2/8/132814618/parafi.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/piwimufuzajonigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenerunikojovo.epizy.com/call_of_duty_android_mod_menu.pdfIn PDF document text
    • http://jelemomibupu.rf.gd/metafadasirixusoveta.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/isopropanol_msds_sheets.pdfIn PDF document text
    • http://mosararivifu.rf.gd/zuvose.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_off0000c236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC236 5100 bytes
SHA-256: df146b64be74a0b800ee68dbd7804b7440b8679e6c99c1b98e6bca604278ff77
font_01_sfnt_off0000d39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 10624 bytes
SHA-256: 005613c6e03e0424e83c09c26eaaf5c1306b98d57284dd07b2643b01196a3726