Malicious PDF — malware analysis report

Static analysis result for SHA-256 3715b2f801bae20b…

MALICIOUS

PDF

37.5 KB Created: 2020-10-02 10:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 16fc01d8af1aed141e62ecd208cf731c SHA-1: 504dcce901967b47fa1089cf82fd18dd07a5bab8 SHA-256: 3715b2f801bae20b33313c78625920df875836c870f57459d251e5bac5179190
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=mcsa+windows+server+2016+study+guide+exam+70-740+pdf+free+download In PDF document text
    • http://files.amommachoosingjoy.com/uploads/1/3/0/8/130874554/memadivozemo-ziwevedabos-fepuli-pozadizizovu.pdfIn PDF document text
    • http://files.marnimigrealtor.com/uploads/1/3/0/7/130776499/512bc483.pdfIn PDF document text
    • http://tejaxogir.worldwar2man.com/uploads/1/3/0/8/130813780/4250333.pdfIn PDF document text
    • http://files.sarahhydeconsultancy.com/uploads/1/3/2/7/132741352/lazovi-zakebapira-kabulor.pdfIn PDF document text
    • https://site-1039779.mozfiles.com/files/1039779/31954216951.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/wifiwuwif.pdfIn PDF document text
    • https://site-1040878.mozfiles.com/files/1040878/7331042130.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/89d446dc-5d07-437a-b529-6d674954b2a6/padax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450b106b-0fca-4820-b637-efc25d84b2a3/46385159953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ccd32d-651e-4363-bb16-bcaac544daad/37274414215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546b746a-4e0b-469d-a4de-9204cae25f9a/sodolifuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355e1afb-9514-4909-94e3-c00582f8974e/fipotonowuluguvunulotiwul.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_off00005008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5008 6480 bytes
SHA-256: 12121a996181ef663835df66e81b10afc3a66050f9555298a9a7c7a04b2ec938
font_01_sfnt_off00006647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 10092 bytes
SHA-256: 87cdebfaa8e4ba41fc62f42ee8ccc53b5c26ec4adff04bdee7a7bacc0341ef6d

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