Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2b09c39d82d300…

MALICIOUS

PDF

40.4 KB Created: 2020-11-03 12:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 95119613759f4e2844dc632182e641e5 SHA-1: d3880b40213b8307f630fb41e1916e14696f565c SHA-256: 5d2b09c39d82d300b16768e1a8d201d088beeb56a58fdb84b8d6e5f814ab3bf8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body and embedded URLs suggest a lure related to furniture or a downloadable item, which is a common tactic for spearphishing attachments. The presence of numerous external PDF links also indicates a potential SEO poisoning or link farm strategy to obscure the malicious destination.

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 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.
  • 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=plaza+house+furniture+selinsgrove+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f8d36d96e971.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/7747297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5f96a0ebe691f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_5f9be822c1cb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mulerux/manual_combination_gun_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/a_long_way_home_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/descargar_budismo_moderno.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/spatial_analysis_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/linubuzekuzevof.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/nudeziza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9D 5156 bytes
SHA-256: 1995964c7a09b00d3424ad14b04dbd7641dd0947bb9d1bfb8e3a3b598008cda6
font_01_sfnt_off00006133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 11028 bytes
SHA-256: 3e6150fb50a74039c4fdfeec73fb10d4da519444b86dbe3fcc8409b7b8aad7dc
font_02_sfnt_off000086fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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