Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b60d2c7850cb3f…

MALICIOUS

PDF

74.7 KB Created: 2021-04-03 04:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 270f5e0c8af757d36d4523b3614130d4 SHA-1: 5388bbab889e118f9b6a5e0048b6bef27b436e7e SHA-256: 33b60d2c7850cb3f1d5c80a9408b235f1cc2f78a2c7188725dfb39d364e5e5e8
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains an embedded URI pointing to 'https://botokaw.ru/wix?keyword=el+condor+de+los+andes+cancion', which is likely a phishing or malware distribution lure. The document body is heavily obfuscated, but the presence of external URIs and the high risk score suggest an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious URI.

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://botokaw.ru/wix?keyword=el+condor+de+los+andes+cancion PDF link annotation
    • https://cdn.sqhk.co/pimidima/hcgdehZ/inside_out_and_back_again_papaya_quotes.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/tufutikosalatepetupedovuv.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/konica_minolta_c224e_service_manual_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/figesuweno/lpEtjgC/20863646877.pdfIn PDF document text
    • http://verifybadgehelp.com/organic_chemistry_2_reactions_summarydvdhn.pdfIn PDF document text
    • http://leadtop.co/jusagarokada4rvw4.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/rokugaduxi.pdfIn PDF document text
    • http://nncucuucuc.space/15715268429f7ls5.pdfIn PDF document text
    • http://kinorio5.xyz/najuveguxatatofxrbdv.pdfIn PDF document text
    • http://huaweistoreukr.xyz/hp_laserjet_p2015dn_driver_free_download_for_windows_7p0k72.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/weight_watchers_bluetooth_precision_electronic_scale_ww910a_review.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/asus_sabertooth_990fx_r2_0_manuale_italiano.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/utEhfQV/sledziona_dodatkowa_po_angielsku.pdfIn PDF document text
    • http://kefets.xyz/ladomodepexosopebib87fcb.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/kaboberalanugenezivonubir.pdfIn PDF document text
    • http://hq-cleartv.info/how_much_weight_can_you_lose_on_a_3_day_smoothie_cleansexuwct.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/iehhGun/nuvezakejup.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/redegelesibif/programming_language_comparison_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/mumoroduvagagijegu.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/79324774447.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/wolodepake.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/solo_parent_leave_philippines_eligibility.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_off0000e678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 4892 bytes
SHA-256: 08e02a8f4e0be4d268ebdc83586fc965b7d9ae73458c727a851761862977b45d
font_01_sfnt_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 11872 bytes
SHA-256: 44c96b67cb3984e60c96dd6ddd2ae837a42398cbe99ee63b71ab19ae98714d49

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