Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e6a51bba067d28…

MALICIOUS

PDF

82.9 KB Created: 2021-03-03 11:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 51a52e492464a3fba0f78e4eb95c33eb SHA-1: 1e1ab690e16428b160b782d4c2c3190c70e20e1b SHA-256: 08e6a51bba067d28e3299195c4e111d53416a7e27973f1e43b7431f48bd92e2d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to link farms and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites, likely disguised as game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=sonic+flash+flash+games PDF link annotation
    • https://cdn.sqhk.co/rubalibuzodi/fGFt1Zz/56899962189.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/hjljfs4/enyopro_dog_crate.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/shark_steam_mop_stopped_steaming.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/53422371573.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/bge6hgr/striker_soccer_america_2015_mod_apk.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/68111012627.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/KiaEjab/joplin_missouri_7_day_weather_forecast.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/hajcVib/new_photo_editor_app_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/igDbHnC/arknights_bagpipe_m3_s2_or_s3.pdfIn PDF document text
    • http://konolux.medianewsonline.com/37418614021.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/r_language_tutorial_point.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikoliduxa.atwebpages.com/2784434126.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/witozatobaxewen.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/arunraja_kamaraj_all_songs.pdfIn PDF document text
    • http://wekidezeze.epizy.com/bladed_fury_free.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/how_much_is_a_70_inch_tv_at_best_buy.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_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 5304 bytes
SHA-256: 5754f3560b4a660e9e7240246ca4fdb21426edff79f64e47970cda0509dacf7e
font_01_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 10268 bytes
SHA-256: 57a3a3cd403380b4353983912ba704e5fa244c552dc2c92ed3a3c4538d5a6fa5

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