Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd4ae85cbe820e6…

MALICIOUS

PDF

57.6 KB Created: 2020-10-06 21:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 045ac12f8a57339fa5e9e3c7a847d488 SHA-1: 72149911afd3b501c5e84121810d457a6ac98f82 SHA-256: acd4ae85cbe820e692433a2b02fc4e693ad45ce38d3971499c0d413bdb7ec6b7
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=arreglos+en+java+ejemplos+pdf In PDF document text
    • http://tatarep.alidwyerofficial.com/uploads/1/3/1/6/131636725/2650526.pdfIn PDF document text
    • http://files.locksofbeauty.com/uploads/1/3/1/4/131437413/rodudari.pdfIn PDF document text
    • http://dezoli.triadfoodtruckfinder.com/uploads/1/3/1/4/131438164/5bfe154562f71.pdfIn PDF document text
    • http://files.learningislifelong.us/uploads/1/3/0/7/130775368/rilebumubiragetif.pdfIn PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/76177139066.pdfIn PDF document text
    • https://site-1043808.mozfiles.com/files/1043808/66509227396.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/pifuxesenafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0994/6012/files/banedinimora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3670/0572/files/64644169101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4488/files/stellaris_subjugation_casus_belli_spam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/bazosuwuvinax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81946dc-38c5-41d9-ae6e-5c9aeb515f34/nebunafug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dc1647-8ef1-426d-95a4-a452ccd01810/20299687872.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_off00009981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9981 5484 bytes
SHA-256: e05ea640e9236f23f2da105b41ff459e8e8b96db197d39f05c63c4746aec0b9c
font_01_sfnt_off0000ac24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC24 14212 bytes
SHA-256: ed9a446d21a5db257c79484ece677c44de1816899d891ca509e5c7718ea1b0e7

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