Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ee768a3fa2ec88…

MALICIOUS

PDF

83.0 KB Created: 2021-06-12 00:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 488db346f9eaa1e70c4b2999cf5c6380 SHA-1: f784b53c4902554314410f9c371f76301eb6dc57 SHA-256: 20ee768a3fa2ec88bfeae853cb01f1f1b2a82c5aa13e600deb0ec37e02effd79
134 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm or redirection scheme. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a fake invoice or payment request, designed to entice users to click the embedded links. While no scripts were directly extracted, the PDF structure and extensive link farm are strong indicators of malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://druttle.ru/123?utm_term=9th+company+game PDF link annotation
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/5700058.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/nuligulakarorexomon.pdfIn PDF document text
    • https://kaxejawajafu.weebly.com/uploads/1/3/4/7/134776484/vupamilenalebow.pdfIn PDF document text
    • https://rusajuse.weebly.com/uploads/1/3/4/7/134730125/pefod.pdfIn PDF document text
    • https://nobiramiw.weebly.com/uploads/1/3/4/4/134403563/ee80cd65a8fa794.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/buzemakakakodetugob.pdfIn PDF document text
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/nifaga.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://jetubabup.pbworks.com/w/file/fetch/145159752/50443995310.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144804264/resnick_halliday_physics_volume_1.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/view_page_breaks_in_word_office_365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2175ad-7aac-4f24-aa11-3447ae08e92b/83746698760.pdfIn PDF document text
    • http://xolajaz.pbworks.com/w/file/fetch/145159818/carl_flesch_violin_scales.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/34551426471.pdfIn PDF document text
    • http://vobaranizume.pbworks.com/w/file/fetch/144828501/what_is_the_normal_range_for_renin.pdfIn PDF document text
    • http://kizisoj.pbworks.com/f/sniper_3d_assassin_pvp_arena_cheats.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/w/file/fetch/144579954/como_descobrir_a_senha_do_wifi_no_android_conexes_salvas_2019.pdfIn PDF document text
    • http://wemilamozede.pbworks.com/f/dls_2020_hack_apple.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/f/name_the_horror_movie_picture_quiz_answers.pdfIn PDF document text
    • http://noxixap.pbworks.com/w/file/fetch/144426429/how_to_reset_playstation_3_network_account.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/how_to_use_vyprvpn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547d61c9-b7ad-4f13-b834-dba8c8874995/dibujos_para_poner_nombre_primer_grado.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144642621/kawozalozisowozu.pdfIn PDF document text
    • http://biribivit.pbworks.com/f/candy_crush_jelly_saga_mod_apk_unlimited_gold_bars.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144418185/motor_kw_to_amps_chart.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_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 4944 bytes
SHA-256: a3bf4867dbb65138806b28347fc68a10e20a07ecc62ff02f5652dfd673342a0f
font_01_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 11404 bytes
SHA-256: b373e97e2685ed3762c10c7e393a215ae339b194f547078ba18212eb17028d55
font_02_sfnt_off000130e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E7 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71