Malicious PDF — malware analysis report

Static analysis result for SHA-256 242c4ed72f00bd9d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 01:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 626fb76b5882f8b46d7b77937b453f0e SHA-1: 0d38b4e839683a41b0ea0b0ea50b51de68025a69 SHA-256: 242c4ed72f00bd9da78500e47d4518a3f0205e20847991d411e46eb09b2c912d
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 configured as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

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://botokaw.ru/strik?utm_term=similar+triangles+worksheet+answer+key PDF link annotation
    • http://love-your-lips.online/ascomycetes_fungibiwg0.pdfIn PDF document text
    • http://theraisins.pro/old_school_cars_for_sale_craigslist090el.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_5ff9abae74fed.pdfIn PDF document text
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/kewetulabo_zogema_fajuv.pdfIn PDF document text
    • http://pomirkapa.site/hollywood_animals_movie_tamil_dubbed_free9vr5k.pdfIn PDF document text
    • http://inostrana.com/fleetwood_mac_dreams_drum_sheet_music3osxl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_60308212e8155.pdfIn PDF document text
    • http://santecmb-sarl.com/what_are_missguided_shoe_sizes_likerarud.pdfIn PDF document text
    • https://subafeso.weebly.com/uploads/1/3/3/9/133986831/gotegufedogemu.pdfIn PDF document text
    • http://topcabinets.xyz/the_diary_of_an_oxygen_thief_summaryxipi5.pdfIn PDF document text
    • http://c-advance.space/bajajixu5vqv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_603eedf7771a3.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/7487823.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/tcs_email_writing_questions_and_answers.pdfIn PDF document text
    • http://salonlabs.xyz/good_group_topicsifscv.pdfIn PDF document text
    • http://drive4mclaneaustell.com/project_portfolio_risk_management_definitionj8b7u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejawaji.myartsonline.com/kalunubodapimupakepewip.pdfIn PDF document text
    • http://nanesipub.rf.gd/penavanabaroruwexatazejef.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/types_of_gears.pdfIn PDF document text
    • http://todugiremo.epizy.com/11420977488.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 5460 bytes
SHA-256: e4033cf75c46bf55c8311a73e059ace928ee93f41d132bd52d0aa1dc5a8f01d4
font_01_sfnt_off0000f3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 10428 bytes
SHA-256: 9869dc90101448f7e45ae9f626e063d2189dbc388ec85beae7b2f695a069e1aa
font_02_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1

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