Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a6aa9a22c66ff0…

MALICIOUS

PDF

72.6 KB Created: 2021-02-16 06:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 463c5698af600572591a48f1e1ec452e SHA-1: 850c43eba6ef59645379867cd38d54b1219054ba SHA-256: d0a6aa9a22c66ff01e4fa066229cf6fb80eb059bd79d3cef9324e1dc30f8b986
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a large number of links on disposable hosting, a common tactic for phishing campaigns.

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://baarspo.ru/123?utm_term=george+foreman+lean+mean+fat+reducing+grilling+machine+recipes PDF link annotation
    • https://cdn.sqhk.co/matijamaj/hhd5ujj/soccer_battle_1._3._7_mod_apk_download.pdfIn PDF document text
    • http://sethel.xyz/answers_definition_synonymuhlfo.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jiixWih/47849955615.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/uzHagjw/where_we_go_pink_live.pdfIn PDF document text
    • http://jgndegs.info/97510185070pg5vg.pdfIn PDF document text
    • http://namedaun.fun/south_park_fractured_but_whole_nudity0248w.pdfIn PDF document text
    • http://cloudplay.xyz/xikomixulepidetogonjvq8d.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/3SEjbz8/rare_beauty_blush_shades.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/kufamisebaf1s3p1.pdfIn PDF document text
    • http://mumiwimag.iblogger.org/72038129826.pdfIn PDF document text
    • http://teagreen.space/ejercicios_de_fol_resueltosrd4m3.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/LjbLie8/66552742934.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/eX8Vihh/58020453498.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hjhibZL/sims_4_cheats_ps4_satisfaction_points.pdfIn PDF document text
    • https://cdn.sqhk.co/muresogus/o3hc6jg/ear_clinic_singapore.pdfIn PDF document text
    • https://cdn.sqhk.co/mabuviko/lYmhahf/plants_vs_zombies_2_game_unblocked.pdfIn PDF document text
    • http://hookup682.site/college_board_interest_surveyrx644.pdfIn PDF document text
    • http://obuv-kozha.ru/wizard101_crown_generator_free_downloadkf17b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godubaxedija.rf.gd/timeline_gantt_chart_template_excel.pdfIn PDF document text
    • http://zezevefo.rf.gd/pemazorowanopodolasu.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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 5600 bytes
SHA-256: 51bcff27bf0a57abb09e548d26b07b9215337f95b8462fa71451d1734b3c25fe
font_01_sfnt_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 11204 bytes
SHA-256: 3c3380ec2fca92ab5f3a200ca10938f20aff68861463101d17204fc1c032f8bf

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