Malicious PDF — malware analysis report

Static analysis result for SHA-256 902bb4fba5a14526…

MALICIOUS

PDF

92.7 KB Created: 2021-06-10 01:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 29ec6731280ffe42a95a9c9807fc6db1 SHA-1: 056266fb8dcba04a5de8421d5440decf7fd1c1bb SHA-256: 902bb4fba5a145263a47ef3d594ec808e99f0927ef1afcbb095f24240ff3743e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Tratamiento aneurisma cerebral pdf', suggesting a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=tratamiento+aneurisma+cerebral+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fe52ad13642a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_60356f6cf210f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_6021ed1eaa532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_5fcc8df9c44d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_600979e10eede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_60370f39a66e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_5fd3bce94d72b.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/a8cef2c3-34d4-45b2-9123-f93017dafdf8/kjv_hebrew-greek_keyword_study_bible_genuine_leather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ddf3ce-c52d-42f2-a6be-249b43e68c12/gefapilebenidonolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8f5538-a149-4eb7-9c47-b7ab880f7e6a/garmin_vivofit_jr_2_replacement_bands_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb463b8-e34f-45ed-b3a3-ff5e7c9098b5/gajuwipiwulavor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeeff5f4-c6ee-46a5-9ac9-160498673058/rewixowekowemanilunitu.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144428022/33303751918.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/w/file/fetch/144562608/1898824132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08f9f42-56c8-4850-85b2-b4b7381ca35b/mililitros_a_gramos_mantequilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4d6069-db61-4673-bda7-dea8d4f78089/n._gregory_mankiw_brief_principles_of_macroeconomics_9th_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29ba78f-24f8-4d4d-ac48-029eddde8b86/sasap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8f2c07-ab8a-4f29-bb3f-ff8726d0d75d/ejercicios_de_homofonos_y_homografos_cuarto_basico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06dddc0-537a-488b-875a-6e49c02b6345/barking_up_the_wrong_tree_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52de395-5f6e-4f33-81ea-19f40a35e1e3/crosman_1077_magazine_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8d81bb-dec5-4f2f-9014-1ced5bf3ceda/samsung_ml-2510_printer.pdfIn PDF document text
    • http://morabef.pbworks.com/f/64460852696.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_off00012a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A15 5392 bytes
SHA-256: b74cb2549fb594e5040b30a3cf087206d5424059af68cee4023387b72065e7ca
font_01_sfnt_off00013c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C48 12276 bytes
SHA-256: 6f1967022f1521d0c0af0a262f17478af664dbce5fa3b61decc99cb1afbae2b5

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