Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4afe09bb37dabf…

MALICIOUS

PDF

41.6 KB Created: 2020-10-03 01:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 973a10f4fdc21927708b9517424aaa93 SHA-1: 0af815287309b01ee78f1c3ba2576c10f9056f62 SHA-256: 2f4afe09bb37dabf9a119ae7bf2eab7b2e6fb718b3b9fc54a1e65db6a9427d8c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=bug+bounty+hunting+essentials+free In PDF document text
    • http://bebafirum.eastcoastinferno.com/uploads/1/3/0/8/130814010/4940855.pdfIn PDF document text
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/lotoj.pdfIn PDF document text
    • https://site-1040280.mozfiles.com/files/1040280/51828770008.pdfIn PDF document text
    • https://site-1038682.mozfiles.com/files/1038682/62884836927.pdfIn PDF document text
    • https://site-1040767.mozfiles.com/files/1040767/41952172210.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/gisedoxogotusokalez.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/695220ab-6713-4529-a8e5-ca05b556e0dc/zukumutitoxuleta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74864c5d-57f7-4050-bdd6-34835726cb51/42929952078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f6f738-18a9-4ac3-9141-c5edbee010a5/badiwakemamegolonuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e10f9b9-888e-4a85-bc1d-c2977a45eda4/rupobodulasojera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3279b8ad-886a-48a4-a387-7690a81af678/wixavidarojej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b50d48-ad51-416d-9c32-59cb8b7aed7c/85617408876.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_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 5320 bytes
SHA-256: f83128c6546f1d5041f125e84dc475f6edc21a77c932dd0930efc8e5a20212e7
font_01_sfnt_off0000761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 10392 bytes
SHA-256: deebfcc401d7aef8e6b6cad6042e2d2172c8754337f323baaaef1549ec17cbe0

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