Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73445eae126361e…

MALICIOUS

PDF

41.5 KB Created: 2020-10-08 10:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fd32d5667332c2a0701fcf32dd72d706 SHA-1: af0b4b91549f61bd2798a197a53ed38b114a45ed SHA-256: d73445eae126361e503740f1fc90ce61beb0a678208abfe0009c3e7dc33552c0
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=antologia+literaria+pdf In PDF document text
    • https://site-1038770.mozfiles.com/files/1038770/lovobizosikir.pdfIn PDF document text
    • https://site-1039207.mozfiles.com/files/1039207/87604769009.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/xidagakaboton.pdfIn PDF document text
    • https://site-1038478.mozfiles.com/files/1038478/tugidaborowevakezazejid.pdfIn PDF document text
    • https://site-1042768.mozfiles.com/files/1042768/12998199751.pdfIn PDF document text
    • http://demowan.thefifacorruptionscandal.com/uploads/1/3/2/7/132710621/3493802.pdfIn PDF document text
    • http://files.wyomingrawmilk.com/uploads/1/3/0/9/130969403/goxozixelakagi_kogazabi_wevebenuj_jatixanel.pdfIn PDF document text
    • http://fapezu.juneaumusicmatters.com/uploads/1/3/0/7/130739459/rirurexu.pdfIn PDF document text
    • http://files.calvary-center.org/uploads/1/3/0/7/130739022/9ac61db27d01ce.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/zavojef.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/10522400052.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/rewegofoxelagozanapa.pdfIn PDF document text
    • https://site-1042089.mozfiles.com/files/1042089/zafomemupojurozazoniwa.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/17294865830.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/4469d759-ff51-4ef8-ac22-77e3a4e6564e/nivekakenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d51385-7bd1-4939-9a74-52f361f0020e/48405199533.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_off000063d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D7 5020 bytes
SHA-256: 3e6f9bf6797072d714be8a8f658f27e5f827fa9728891090931f2934d0c06e44
font_01_sfnt_off000074ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10900 bytes
SHA-256: b86ed6b186877e18c9fae7b78d3897720618ae6ca1814a73f678aab975528c9e