Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a92302e6fb22cb5…

MALICIOUS

PDF

34.4 KB Created: 2020-10-07 16:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5d9f9e4a8a593b44ea22db23d97b5bfb SHA-1: 15d30e9c5b69d2942810970f25705bc82997a666 SHA-256: 7a92302e6fb22cb597a2438ebc745706a409ebebd24928bed164f844de1a7889
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://cctraff.ru/strik?keyword=chongo+tupac+chorrillos In PDF document text
    • http://baluvor.mysteryshoppingonlinejob.com/uploads/1/3/1/6/131606127/e70a95e5ccd.pdfIn PDF document text
    • http://files.leluxhomescents.com/uploads/1/3/1/4/131407028/9ca7cdd.pdfIn PDF document text
    • http://files.springdalesva.com/uploads/1/3/0/7/130776326/1059353.pdfIn PDF document text
    • https://site-1038578.mozfiles.com/files/1038578/kurupajitigav.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/81678417402.pdfIn PDF document text
    • https://site-1045392.mozfiles.com/files/1045392/vakezalumitexidinefe.pdfIn PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/64401126120.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/db4fee2a-9e34-4a36-8279-d55527bdd8b9/sumiroxixojozotoximugeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30646928-123d-47b6-8472-8f58fc30ae83/41826703640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3211/7916/files/6730378627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0377/2565/files/wigelevik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6546/6270/files/enilsa_brown_new_videos_2019.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_off00004a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4E 5100 bytes
SHA-256: 3e6b99fd5cc13ef384afd1009ee57bb8851de29dc0807286c298ea408f15196b
font_01_sfnt_off00005b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 9816 bytes
SHA-256: a03b3d42914bf8be46768315525cbcd7bcf434b707026a3f3c0582f3c7d3cb4a