Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de3600536f7bf2d…

MALICIOUS

PDF

81.3 KB Created: 2021-03-25 10:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29a7c723c99af140860575629d7fb6d8 SHA-1: 77f1117414b4aa4fa58a06428623d3fa5e8dbfda SHA-256: 0de3600536f7bf2dafa2731898550977c952a0d931e4941964d1e87494990cf9
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI, pointing to a suspicious domain. ClamAV also detected the file as a phishing trojan. The document body, though heavily obfuscated, appears to be related to obtaining a doctor's note, suggesting a social engineering lure to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=how+to+get+an+emergency+doctor+note PDF link annotation
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/rexuwuxu_rofovoredubin_pavabaxaf_bibogawunuvim.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/does_1_rep_max_build_muscle.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/7661552.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/61317384936.pdfIn PDF document text
    • http://jezituwevusefaf.iblogger.org/14168368130.pdfIn PDF document text
    • http://viewcreditscore.info/80066212682z8ybt.pdfIn PDF document text
    • http://fitness-ital.fun/gitebemubesozuwjfmu.pdfIn PDF document text
    • https://debarinibew.weebly.com/uploads/1/3/0/7/130775297/a2c0f87.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/5207084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e18d56-44b3-4e44-abb6-06f3bf2d5410/stranger_in_a_strange_land_chapter_summary.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/leginaxagujuxoso.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/the_rational_optimist_chapter_summaries.pdfIn PDF document text
    • http://buxozowiliva.rf.gd/glitter_background_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/1875889979.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/tigisewewojosopepugukor.pdfIn PDF document text
    • http://duvasupe.epizy.com/bissell_pet_carpet_cleaner_solution_ingredients.pdfIn PDF document text
    • http://feneluveje.epizy.com/85868871484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3951c66c-9be5-4fd4-99b9-014d666569e1/lotesan.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/30503510210.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/47206171172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d342b86f-83b3-48e9-9926-a6d846b3d16a/speakeasy_tattoo_boone_reviews.pdfIn PDF document text
    • http://pexirud.onlinewebshop.net/rufiru.pdfIn PDF document text
    • http://kunizifafam.epizy.com/ferixanavugatibelor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2530c67c-658c-472e-bd52-003fa94f90ff/how_to_get_into_pipefitters_union.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_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 5204 bytes
SHA-256: 763b158aa11968f87152e282cf51b38d98af3754a0aac9385515b11bf058c2d7
font_01_sfnt_off00011120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 11184 bytes
SHA-256: e278bbe90a2005f313a63f6367d0aecf0dc9cb10f324d4e4586e8e97455efc2f

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