Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c98fac3c555bc4…

MALICIOUS

PDF

40.5 KB Created: 2020-11-01 03:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2e3327cfef54694d34a86f5302026228 SHA-1: 95605f39e36c137c66ba8305fc7000369f0fbce1 SHA-256: 65c98fac3c555bc4842a4d09074d2c9171689ec7994d55e5f3e50f8bc6f4aa6a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific URL pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL and other links that appear to be part of a link farm designed to attract search engine traffic. The ML classifier also strongly indicated maliciousness.

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://ttraff.club/123?keyword=ways+of+the+world+chapter+13+pdf In PDF document text
    • https://mukaxonalox.weebly.com/uploads/1/3/4/5/134580963/6b530d6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5f99bc1c60a0f.pdfIn PDF document text
    • https://fajagewuw.weebly.com/uploads/1/3/4/3/134350503/lalorunobe-vagubevoda-modaleba.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/fipofaroku.pdfIn PDF document text
    • https://miburinu.weebly.com/uploads/1/3/4/4/134464577/jejisajale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422906/normal_5f9de123b693f.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/siximemabumi_danudekokovur_kekevosovisit_mojijoxojade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4437/0070/files/il-2_sturmovik_game_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5597/7913/files/dojoziribirorodawur.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/gubedafurewonuriwoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9228/4070/files/17935631082.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/buku_tafsir_mimpi_togel.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/conversiones_de_millas_a_kilometros_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/staff_performance_appraisal_sample.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_off00005f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 5664 bytes
SHA-256: aec0b1a7b3f06959a89852ba049d884f7f412a4550fa58e3df0091f08f10b151
font_01_sfnt_off0000727d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 10244 bytes
SHA-256: cb5415fafa85cc30502d15c50d0a254de1cc936cf8400ab3a7ec245d3fcb4548

Open this report in the interactive analyzer, or submit your own file for analysis.