Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eac0470fe2b28aa…

MALICIOUS

PDF

93.1 KB Created: 2021-04-20 01:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae7b3295112078ee70c752f8fbeccac7 SHA-1: 81f20804de366c29bf9170e31c542015118ec8cc SHA-256: 8eac0470fe2b28aae768406d6e36e87c5f4637891befc34c933f0f07e58b2f4c
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=how+to+reset+jvc+tv PDF link annotation
    • http://webpost.pro/698482915591n328.pdfIn PDF document text
    • http://samelike.site/17749948352sa76g.pdfIn PDF document text
    • http://belldiscount.ru/radionics_d7412g_programming_manualgayi6.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/AkjjieQ/forest_wallpaper_iphone_11.pdfIn PDF document text
    • http://sayseedokg.com/79344312298e6a25.pdfIn PDF document text
    • http://b4shop.icu/bikini_body_guide_onlinevtemw.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/T7ijagf/does_coffee_raise_your_resting_heart_rate.pdfIn PDF document text
    • http://pss77.ru/present_simple_and_present_continuous_exercises_with_answersvn650.pdfIn PDF document text
    • http://blue-tick-central.com/kalufolidukifafatekoj8kpht.pdfIn PDF document text
    • http://axecheat1.xyz/nanoblock_unicorn_instructions_downloadr8wn2.pdfIn PDF document text
    • http://hookup153.space/las_heridas_del_alma_libro3m81b.pdfIn PDF document text
    • http://esparks.ru/who_qualifies_for_maternity_pay3wvmt.pdfIn PDF document text
    • https://cdn.sqhk.co/barosevarega/hgPjhgj/dragon_city_battle_music_2.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/ekadantaya_song_mp3_free_download8dbc1.pdfIn PDF document text
    • http://huseyincanx.com/1040_form_2016_schedule_a27pz9.pdfIn PDF document text
    • http://baranaydin.org/redi_chek_remote_thermometer_instructions_bb-22hvg41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumaborelap.rf.gd/sims_3_ambitions_product_code.pdfIn PDF document text
    • http://gatazor.epizy.com/jedarogorofov.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/airline_commander_mod_apk_apple.pdfIn PDF document text
    • http://donarup.rf.gd/nz_learners_test_answers.pdfIn PDF document text
    • http://fodozuzur.rf.gd/tratados_internacionales_de_mxico.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_off00012d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D57 4740 bytes
SHA-256: 50f4c054e94ea8e977800574eafb45eda73ae608a915d09246abe6a440504ba1
font_01_sfnt_off00013da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA2 12368 bytes
SHA-256: 5d3e9ecfffd3cba74180514cf67635da19d62a01021e8a4d307e48aa6be45a64

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