Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d9a1183b3bdc1f…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 16:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0672c5a7c628e563bf3fcfcc8ec7bc99 SHA-1: d3b480cb4d07168cd684ecfbcb02d30e91fc07f0 SHA-256: e0d9a1183b3bdc1f22666550e610bb90dc2b93a995b869781ab56b5c437d5f93
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text fragments like 'Ft 857 cat display' which, combined with the URLs, suggests a lure to external content.

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://golowaki.ru/aws?utm_term=ft+857+cat+display PDF link annotation
    • http://kawlites.online/88278459889w0r5q.pdfIn PDF document text
    • http://imm-shoes2.club/formation_autodidacte_exceledaph.pdfIn PDF document text
    • http://italywom.space/harbrace_guide_to_writingtnz3o.pdfIn PDF document text
    • http://true-board1.club/how_to_lower_2007_yamaha_r6zvzzj.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/jdjg1hc/cch_appvn_cho_iphone.pdfIn PDF document text
    • http://medakijizu.22web.org/grid-_template_columns_repeat.pdfIn PDF document text
    • http://kmikaerfs.ru/how_to_set_pioneer_car_clockeit4v.pdfIn PDF document text
    • http://prizinsta24.space/what_is_the_joke_at_the_end_of_the_killing_jokei7e52.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/djdkjd5/37738928721.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/ahahgyI/mx_player_tv_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/xhczghc/angie_adventure_badlands_dragons.pdfIn PDF document text
    • http://yachts-4-sale.com/what_does_contrast_in_art_meancgfyv.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/jhihaXJ/burofasekixopu.pdfIn PDF document text
    • http://sabudunujo.22web.org/ms_driver_license_renewal_appointment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujewuliruj.epizy.com/lasifiroxipazilinajoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/verojulerozoko.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/86093168655.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/jasonunivupeke.pdfIn PDF document text
    • http://zilapiwet.epizy.com/24502478935.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_off0000f057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 5428 bytes
SHA-256: 88713b084e50a09b4916510dfcda714c818272dd6a2c170c5d6a9177b2112b94
font_01_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 11288 bytes
SHA-256: 8f6a025fec22a73d590df5ebbd4fafff02cf56da339cc107e552f1fa9f19639f

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