Malicious PDF — malware analysis report

Static analysis result for SHA-256 86520ea9058d550a…

MALICIOUS

PDF

76.0 KB Created: 2021-04-10 11:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 973c73956c1df22c81c028155d4bb0f9 SHA-1: 78025c92ee5e9534d9854e399e1acb238cbdf670 SHA-256: 86520ea9058d550a1d6b5d32b02842cb22b9349fc8e2b06e961713280cefb2f8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'baarspo.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Buddhism for beginners'. No scripts were extracted, but the presence of external URLs and the malware classification strongly indicate a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=buddhism+for+beginners+thubten+chodron+pdf PDF link annotation
    • http://bioforce-co.site/dd_dogs_kickstarteribphu.pdfIn PDF document text
    • http://sevibifodome.getenjoyment.net/uli_cable_tray_catalogue.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/pogimenisurinefofojid.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/cgst_bare_act_2020.pdfIn PDF document text
    • http://bestunew.xyz/auto_hashtag_instagram14swy.pdfIn PDF document text
    • http://bigswinner.space/will_chicken_broth_go_bad_if_left_out0qrbb.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/xaburowesufapajuditiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/MjWgdgc/duck_hunt_dog_name.pdfIn PDF document text
    • https://cdn.sqhk.co/wipedekis/5g6ibja/zudufugugizaka.pdfIn PDF document text
    • http://pomirkapa.site/45589136203meql1.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/24610706377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/36649651003.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/aasl_standards_framework.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_edbbb290f492470d8e5ac5ac19c7b3ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/jeep_cherokee_2014_owners_manual.pdfIn PDF document text
    • http://bitines.myartsonline.com/anatomy_of_the_moving_body.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_2ad484b230e04c43b032c8e7312f5e5b.pdf?index=trueIn PDF document text
    • http://gegilifopom.myartsonline.com/tenulunobavofunezanodo.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/cestini_di_formaggio_grana_con_risotto.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/23417928792.pdfIn PDF document text
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_a2d37ef7fce8494daac639eff5afcb8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/learning_styles_2018.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_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 5516 bytes
SHA-256: 28943499e8852b5b4a81ec83e8eafa5d5a2f628d472c5c8b57b94fcc314422fe
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 11076 bytes
SHA-256: 1957b9ffa2b355375d946339deb5a2c5c59616d6de78827de374b9a6a9c5b8d4

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