Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8559325fd7f626…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 15:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 66cd24213bdc434a0dfe0f1ef3c38dfd SHA-1: 81989e536e28453001fd0663011edb62574e8b5e SHA-256: 0b8559325fd7f6266acf75aeb6fffcc1676b6ba629f311bc44aeccf9a4e165fe
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, suggesting a link farm designed to host malicious content. The primary URL, 'https://xezojetit.ru/aws?utm_term=my+friend+dahmer+full+movie+english+subtitles', is presented as a lure for movie subtitles, which is a common phishing tactic. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a phishing document or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/aws?utm_term=my+friend+dahmer+full+movie+english+subtitles PDF link annotation
    • http://prizinsta24.online/fatafadegurud5q163.pdfIn PDF document text
    • http://marketes.pro/adagio_in_g_minor_sheet_music_violindocxb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381347/normal_5fe469c3631d8.pdfIn PDF document text
    • http://clipshd.design/whats_the_next_marvel_tv_show4qt19.pdfIn PDF document text
    • http://leqqurint.online/wimimenujopexado12wux.pdfIn PDF document text
    • http://allieshouseofhope.com/892449489011kfvf.pdfIn PDF document text
    • http://chisto-chisto52.ru/xapateta2e09o.pdfIn PDF document text
    • http://grinallex.shop/download_netflix_on_laptoplpxm9.pdfIn PDF document text
    • http://onlinesos.tech/born_a_crime_audiobook_chapter_2ad8pt.pdfIn PDF document text
    • http://alcozerox.com/62139489005qv7h0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_6040ad8731d04.pdfIn PDF document text
    • http://naturebiolog.fun/cuisinart_deluxe_digital_convection_toaster_oven_broiler_costcojz6ix.pdfIn PDF document text
    • http://tehnikator.ru/40679927080j3iq6.pdfIn PDF document text
    • http://vnds-super.space/birla_sun_life_mutual_fund_stp_formvma47.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://lirepotinemos.rf.gd/pofunuburewizugeterez.pdfIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_7419bca0f5624a21a0df5b73dfccd281.pdf?index=trueIn PDF document text
    • http://vilulew.rf.gd/474597615.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_76db4169f16a4beab9752f3614a6b33f.pdf?index=trueIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_0807f2154a354d32811229ff9a267036.pdf?index=trueIn PDF document text
    • http://tejozusob.rf.gd/lanezogufikebegamemom.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_off0000d343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 5508 bytes
SHA-256: 0d95570fb8eb19e5f0c236307e3cbfe0480107b557b7fb4ab45d3f77667fbddc
font_01_sfnt_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 11636 bytes
SHA-256: 4adaa347a5b01f8f417a11c45ababe811c9ea3fd1cf588572600583acf783e43
font_02_sfnt_off00010c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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