Malicious PDF — malware analysis report

Static analysis result for SHA-256 879e20849b991d7b…

MALICIOUS

PDF

41.7 KB Created: 2020-11-07 17:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 26c17c99ec7acf81ff106277087bae94 SHA-1: 05818dc853cc36bc7095dd329c62423994856619 SHA-256: 879e20849b991d7b981d8bcfbc2f0ba66cbefaa4d4c60f1f097ef3c76791bdb1
66 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely intended to lure the user into a phishing or malware distribution scheme. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed for SEO manipulation to attract unsuspecting users. No scripts were extracted, but the presence of embedded URLs and the ML detection point to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=human+environment+interaction+in+texas PDF link annotation
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/a79f96a358e9150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f9b963e4e362.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404964/normal_5f9c4868a4a5e.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/ragenuvu.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/6918560.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/8240329.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/buxamofezo.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/642790d4-f142-420f-88cf-59bfc3e92137/ruzom.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/stanford_early_decision_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ec8649-5b6f-496e-b89e-9e09db578825/wiseguy_tv_show_theme_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055ff4e3-b9b8-4021-86ef-d2c484dcda0f/harman_kardon_onyx_2_owners_manual.pdfIn PDF document text
    • https://delutubaradu.files.wordpress.com/2020/11/wogagetesagesuvega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c155815-18c9-438f-95fa-dda2e62c627b/54816836132.pdfIn PDF document text
    • https://vasedaroxito.files.wordpress.com/2020/11/43559079740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98d8aa3-bddd-4d79-befa-eb30780b7ebc/23621429412.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_off000063b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B3 5000 bytes
SHA-256: dc5c73fe0cc05197e3d6cb844a20b6fcf68013c68cd2288f6841ded4740c3bd6
font_01_sfnt_off0000749e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749E 10840 bytes
SHA-256: c01564bc7f1bf4bcdddd80338a4836e902aeeee6c96b1d9dd33b39bbce4e5f36

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