Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30dec5ea7c325fb…

MALICIOUS

PDF

95.8 KB Created: 2020-10-03 05:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ad4987899afff7adf46a8d8b6c7c56e8 SHA-1: f7855b3dc7264b785e9275f323bdf826c7637918 SHA-256: e30dec5ea7c325fb9b6146d7c230cd45513af441aaa03caab30e130b154f3360
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links that redirect to a known malicious domain, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector.

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=articulo+14+bis+pdf In PDF document text
    • http://sedoruja.mndeathcollaborative.com/uploads/1/3/0/7/130775990/dujesaw_kuguwotiw_sevuvus.pdfIn PDF document text
    • http://kubimire.shonscience.com/uploads/1/3/1/4/131453526/judinitorolojun-zesusekuzivavuj.pdfIn PDF document text
    • http://faxud.istanbulsanatlayasam.org/uploads/1/3/1/4/131454215/855119.pdfIn PDF document text
    • http://files.uwkfk.com/uploads/1/3/1/4/131453177/62bf88d3c.pdfIn PDF document text
    • http://fimudala.robertmwood.com/uploads/1/3/2/7/132710621/dajokifamorefulezus.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/75341627450.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/83937228407.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/85669989205.pdfIn PDF document text
    • https://site-1039251.mozfiles.com/files/1039251/xuloxigoxoburivuvifizoda.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/9655d929-7273-4d6a-9283-c90646033c3e/85880345243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab85e88e-fb8f-4bcb-a964-b6f28ef9a866/72636821868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10980f3d-175e-47b2-8368-b5a9273f0d62/xixokokazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deeefdfe-f24f-433e-bfdb-52149b44360b/19549364445.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_off00013cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFD 5208 bytes
SHA-256: 75c86d6cd4953c342c185162dcc198903f8d5ccbd76eb45f2875d6b331fc1e9f
font_01_sfnt_off00014ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ECE 11168 bytes
SHA-256: 1de0267a2e72f6bf054a255c8f30450d1ea86dfa6ec51ddeaee0b36b5593a35a

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