Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dfcd1c388315d1…

MALICIOUS

PDF

76.2 KB Created: 2021-04-28 23:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 573f57f2533498be2561b4027c92e762 SHA-1: 98a86eb86c2ed1002dd55b9f5cde9280e4e684d4 SHA-256: e0dfcd1c388315d129066829c5a5266264372160066b6c6e5888feb5b78e7c90
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=d%2526d+5e+dungeon+player%2527s+guide+pdf PDF link annotation
    • http://vexezujuzas.scienceontheweb.net/dazutotunu.pdfIn PDF document text
    • http://rutetasilatigo.iblogger.org/67323061050.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/albert_camus_la_chute.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/how_many_carbs_in_burger_king_cheeseburger_without_bun.pdfIn PDF document text
    • http://naturalik.fun/among_us_memes_red_sus9w6nu.pdfIn PDF document text
    • http://buwafalaruri.22web.org/air_conditioner_maintenance_contract.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/sole_e95_elliptical_cross_trainer_reviews.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/harry_potter_book_1_quiz_questions.pdfIn PDF document text
    • http://circulyarkadigital.xyz/8311143700002jyn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piludid.epizy.com/elmore_leonard_raylan_givens_fire_in_the_hole.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_70b92c8899e84fee9beab5faed83c04d.pdf?index=trueIn PDF document text
    • http://zuwolum.rf.gd/27624067137.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_f17772bfc9f941ff8c875e9fba0b2b10.pdf?index=trueIn PDF document text
    • http://wugupijejituzog.rf.gd/88270642436.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_a3f414fa6fe7460288b51dad50054b13.pdf?index=trueIn PDF document text
    • http://vubebolideb.rf.gd/definisi_stigma.pdfIn PDF document text
    • http://sugexure.rf.gd/jam_speaker_wont_switch_on.pdfIn PDF document text
    • http://nuxibuzejapise.epizy.com/concept_design_report_sample.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_21c003f2c55b4e36b4c32850e5df2959.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_38b3b72eeddf45eeaeb353c11493a758.pdf?index=trueIn PDF document text
    • http://xudedobivi.epizy.com/cereal_grains.pdfIn PDF document text
    • http://jiporiri.rf.gd/reporting_someone_for_breach_of_gdpr.pdfIn PDF document text
    • http://revugina.epizy.com/31918469974.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/1865344091.pdfIn PDF document text
    • http://gefutikavuza.epizy.com/taledisafovufukogap.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_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 4156 bytes
SHA-256: e28c3d75b71adbbf3e3f51f1fa20b85ae8a239f1e87d766e9236934b86ab0752
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 10724 bytes
SHA-256: 09bd90ac06f6103dd69d0886203d5ce28b5a4bda75e833c9c2d26ba78c48ee23

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