Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8a7ae4c8f76386…

MALICIOUS

PDF

79.9 KB Created: 2021-02-27 18:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3a53c512e862e00ce467065720840131 SHA-1: 9195d58b15685b491a84f4e8ab0fc0956efd6753 SHA-256: 5e8a7ae4c8f76386cf73a8d1d270da0c4282d6a7f3d0f0a9ba1ccbdd307375d2
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the sheer volume of suspicious URLs points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=movierulz+2020+kannada+movies PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420013/normal_5ff6afcaea470.pdfIn PDF document text
    • http://natiral.space/gta_san_andreas_1._08_aptoidexb9o4.pdfIn PDF document text
    • https://cdn.sqhk.co/pibigovaxavu/5iikTZZ/cats_casino_real_hit_slot_machine_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/geeNvZE/disney_movies_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_60320bb2e4591.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_many_globally_have_died_from_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/dsYggjf/super_wings_jett_run_mod_apk_unlimited_money.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/2008_honda_cr_v_maintenance.pdfIn PDF document text
    • http://sreview.online/caller_ringtone_in_tamilifzzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5fd235f036e3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502920/normal_5ff92f0e46172.pdfIn PDF document text
    • http://cooldomen.space/40377181395g8jps.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/cjjicgc/47652879849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_601fd16243610.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/ZImnhc5/best_free_fps_offline_games_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/cjjuggk/70876453999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5fc8970561019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_5fca98e49ce50.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
    • 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_off0000eeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 5224 bytes
SHA-256: bbb66d198a391c6882b57086a431c9ef39874a5b8eb3415f7db308eabbd1e25b
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 10576 bytes
SHA-256: b93d355534f95c202b9cadab536bb8e4bdc6b18df00f64ab82776aec0be65c67
font_02_sfnt_off00012475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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