Malicious PDF — malware analysis report

Static analysis result for SHA-256 67339831ac08004d…

MALICIOUS

PDF

80.0 KB Created: 2021-04-03 12:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcad33a6cc7bde5bd368e07f9f0dcc09 SHA-1: 17434a91029cad6e1bb5ebc40ef14d996b628a03 SHA-256: 67339831ac08004d0e8ab5f76c63203854352b28fa522c82f0d576ffb00dd144
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains text related to an 'ethical hacking course' and an embedded URI points to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs and the overall detection indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/aws?utm_term=certified+ethical+hacking+course+in+india
    • http://rulabepotinujeb.mypressonline.com/fedex_printing_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4376875/normal_60604c692d5f2.pdf
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6046c8e9dd148.pdf
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5fe42878c7ade.pdf
    • http://fukazab.mywebcommunity.org/what_time_period_is_sherlock_set_in.pdf
    • https://cdn-cms.f-static.net/uploads/4371536/normal_603123a314d62.pdf
    • http://fafuzum.sportsontheweb.net/12286215322.pdf
    • http://leledup.mypressonline.com/how_to_cook_roast_chicken_in_a_pressure_cooker.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gefilodeza.myartsonline.com/kubabixovuse.pdf
    • http://gomugugagaf.onlinewebshop.net/catalogo_de_bujias_ngk_2020_mexico.pdf
    • https://uploads.strikinglycdn.com/files/6215e37d-a093-4e23-bd39-212cd2989a51/how_much_oil_does_my_husqvarna_riding_lawn_mower_take.pdf
    • https://s3.amazonaws.com/rirusozo/24275775745.pdf
    • https://uploads.strikinglycdn.com/files/987d334d-0f5c-46c2-a38f-0a7945b84431/fifty_shades_of_darker_full_movie_download_in_hindi_dubbed_480p.pdf
    • https://uploads.strikinglycdn.com/files/56a4eadf-ad6b-4c9e-bb3f-b14e4d3317f8/bijigif.pdf
    • https://uploads.strikinglycdn.com/files/3318216d-9648-482f-8bb1-97cff7fb7cda/9962359049.pdf
    • https://s3.amazonaws.com/mubefula/oracle_pl_sql_exit_cursor_loop.pdf
    • https://uploads.strikinglycdn.com/files/71886ac9-39a0-4c62-b077-3c945e369c61/faxewiposelivi.pdf
    • https://uploads.strikinglycdn.com/files/bb557829-3267-4285-8857-6993ad67e128/sumurivelidosedufibivevi.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/lijubasir.pdf
    • https://s3.amazonaws.com/wovugi/suwiru.pdf
    • https://s3.amazonaws.com/bidemewufa/here_i_go_again_drum_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000fb2e.bin
cdde256cb146ea30240c615f6ecd70357ae908e0b13c6d560eda3926f9a0c92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 5252 bytes
font_01_sfnt_off00010d00.bin
f73773afa88b03314bf07972ef4b18642c45b0d79dfc855c73c4c5084fd8100e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D00 11064 bytes

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