Malicious PDF — malware analysis report

Static analysis result for SHA-256 6421c29d2c52fa3a…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 05:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8778739857afc5c8737522cc1336962 SHA-1: 6a5f36e9733c642708a72b3289e769193ab97083 SHA-256: 6421c29d2c52fa3ac0324db7b1f7fc059dd2bdae3d2ce11f71c5d4b664296238
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'https://pelibifir.ru/wix?keyword=biology+corner+human+population+growth+answers', which is likely a phishing lure. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest an attempt to redirect the user to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=biology+corner+human+population+growth+answers
    • http://nitanupemil.mygamesonline.org/57205312909.pdf
    • https://cdn.sqhk.co/mifigatira/aghibAN/wimoxovakavemo.pdf
    • https://cdn.sqhk.co/donaxewon/RjbGOjf/3263535040.pdf
    • http://fakts.design/51437657446xm489.pdf
    • http://copyright-help-report.com/sunbeam_velvet_plush_electric_blanket_twinkv1w5.pdf
    • https://cdn.sqhk.co/josurowelimu/dcjcjhM/39567147657.pdf
    • http://menformula.xyz/100229490569abkn.pdf
    • https://cdn.sqhk.co/gulizate/iNLjjha/stream_alerts_bot.pdf
    • https://cdn.sqhk.co/fusureviweki/jaihbgj/bloomsbury_farm_wedding.pdf
    • http://se-mrush.com/tan_long_haired_miniature_dachshund_puppies_for_saleqq6pw.pdf
    • http://lupelisizi.medianewsonline.com/tuzibuwude.pdf
    • https://cdn.sqhk.co/tororukiwuri/RidhaRj/33833046602.pdf
    • https://cdn.sqhk.co/xefilelo/ege9jie/jonah_hill_road_trip_movie.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tufitijinexu/calendario_de_consejos_escolares_de_participacion_social_2019.pdf
    • https://s3.amazonaws.com/lonozote/canon_6d_mark_ii_manual_english.pdf
    • https://s3.amazonaws.com/gazivemon/62408420513.pdf
    • https://s3.amazonaws.com/jalasilunaz/putigipetopawilutapagenuf.pdf
    • https://s3.amazonaws.com/padadutiseni/a_clockwork_orange_1971.pdf
    • https://s3.amazonaws.com/tutasujal/daily_power_devotional_guide_2019.pdf
    • http://vovakupalujum.onlinewebshop.net/how_to_apply_rossi_gel_polish.pdf
    • http://pewubik.atwebpages.com/nitro_to_word_converter_software_free_download.pdf
    • http://tulajadulixo.myartsonline.com/lurefejuduxagamaxeni.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/free_child_care_agreement_forms.pdf
    • https://s3.amazonaws.com/dubiditiginowo/vogopumozowaloxi.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_off0000fafa.bin
9153a2d79151cd240a320c3c67080886510c9fc0b78c380a8f9565914d102cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 5588 bytes
font_01_sfnt_off00010ded.bin
e771d887c68d9d5407efbe31014a87c096444f2055e186c9efa537c7e47aae84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 11336 bytes

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