Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03138033c76cef1…

MALICIOUS

PDF

97.6 KB Created: 2021-03-17 22:21:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1cbd801f836113f749b7f8105a19fc6 SHA-1: 7688a4f40fbce8a54573be50bb996fe842afc36e SHA-256: a03138033c76cef1ba2a6c4ca6970ed4c49848e1d14d036b1442eb007b643a06
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that points to a URL associated with cancer treatment keywords, likely a lure for phishing or malware distribution. ClamAV and ML classifiers strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=tratamiento+para+cancer+de+pulmon+pdf
    • http://gubinuwub.iblogger.org/add_text_to.pdf
    • https://cdn.sqhk.co/fagevibe/YB7gfmA/3d_shooter_games_unblocked.pdf
    • http://puloxev.iblogger.org/18697551740.pdf
    • http://xewaxoweva.22web.org/kalekutujonezujamojoji.pdf
    • http://dijepitezuk.22web.org/days_of_the_week_used_in_a_sentences_in_spanish.pdf
    • https://cdn.sqhk.co/dudumadopole/gjaPmhi/tajukegezofigujigesop.pdf
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/pijirixubateb-sizezor.pdf
    • https://cdn.sqhk.co/nakunadubux/Djiianm/23017864442.pdf
    • https://cdn.sqhk.co/woxiwovar/igjhjhL/lost_echo_resonance.pdf
    • https://cdn.sqhk.co/mutobudenit/agihj3V/fun_facts_about_costa_rica_culture.pdf
    • https://bopegaxuz.weebly.com/uploads/1/3/1/4/131406849/368334.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tiwinifo.epizy.com/fedibenosuzebumizos.pdf
    • https://s3.amazonaws.com/pusori/algebra_nation_workbook_answer_key_section_4.pdf
    • http://bexukopelut.epizy.com/who_is_the_killer_in_the_killing_season_4.pdf
    • https://s3.amazonaws.com/wobuzisibal/how_was_the_movie_the_birds_filmed.pdf
    • https://s3.amazonaws.com/sigobija/gixokowuporolisupeloniru.pdf
    • http://mafifupep.epizy.com/manualidades_halloween_para_nios_para_imprimir.pdf
    • http://tefabonapo.rf.gd/bipogipemasatiganolafuxef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://medlineplus.gov/spanish/lungcancer.html
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f12.bin
bf41f09edcc3b2fd2711c1063f261cebcf00c96e23b03f067669eeae17871927
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F12 5072 bytes
font_01_sfnt_off00015038.bin
e93e80429a82cbf5627b29a83c84baf2b75f80ad00927a398a3341985434661c
pdf-font-stream PDF embedded font (sfnt) at offset 0x15038 12308 bytes