Malicious PDF — malware analysis report

Static analysis result for SHA-256 54eb8fc8f6b76819…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 22:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 16be994e2bb89987f276ddda46727ec1 SHA-1: 4d6e5f371d550ebb23a604d26eeaef953f0683f7 SHA-256: 54eb8fc8f6b76819473efe4d11d7f4418ed906d1c35245b0b6a357e9b45d5fd0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely part of a social engineering lure, attempting to trick the user into clicking it by referencing a popular children's book.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=princess+and+the+frog+book+pdf In PDF document text
    • http://umkatrade.ru/is_the_movie_king_of_staten_island_based_on_a_true_storyp9ozk.pdfIn PDF document text
    • http://icily.xyz/costos_de_no_calidad_definicion6l6k1.pdfIn PDF document text
    • http://axecheat5.xyz/google_search_history_on_phonedln8c.pdfIn PDF document text
    • http://sbrf.link/arizona_master_gardenerz6e81.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/xewoxakikanorojo.pdfIn PDF document text
    • http://rocketdocs.us/78209822669xh988.pdfIn PDF document text
    • http://lofitner.buzz/omnitech_shredder_manual0qpyx.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/zebevivebejeduv.pdfIn PDF document text
    • http://about-fb-support.com/does_chiari_malformation_cause_nausear22e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaforapibasaw.epizy.com/vozusururogorimufesikuli.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/guided_reading_level_equivalency_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/dbs_continuation_sheet_who_signs.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/atualizao_android_9_para_j7_prime.pdfIn PDF document text
    • http://denijutogowe.rf.gd/trimet_lift_number.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/canon_eos_70d_instruction_manual.pdfIn PDF document text
    • http://vibofaser.rf.gd/60214278525.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/53161990319.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/muronixuwigan.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/1137423924.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/puwawaduburimuseritonozel.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/quality_assurance_quality_control_plan_free.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_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 5588 bytes
SHA-256: a98161fef960b6e84219a5b82db5774e7e5b97027ed7a690d88f7bbf2a666bd8
font_01_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 11744 bytes
SHA-256: 39f0e9f528d09ccc8de840a141ba23bb082716affc572a8ab0ae482e519fe8ef

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