Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a77bbdb4b0e3f1…

MALICIOUS

PDF

75.2 KB Created: 2021-03-30 22:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b9072d54d1a7ae8436c8a17de31fd806 SHA-1: 2e6fb6f19000d4510206870524e994c3f3cb9439 SHA-256: 92a77bbdb4b0e3f1c584cf502d71833c9695cf6175ef0e4737d669c9f836d60f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain, disguised as a performance improvement plan template. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/123?utm_term=hr+performance+improvement+plan+template PDF link annotation
    • https://cdn.sqhk.co/foroboreb/diaryf9/halloween_store_staten_island.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/dD9Fsdo/kawowof.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/tHhd2ji/best_80_s_dance_music_compilation.pdfIn PDF document text
    • https://cdn.sqhk.co/wanolugago/ehjrgdw/zigebekonezenumabe.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/jdjhajM/vupadeka.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/DgfWigd/zezuruvekudofemu.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/gfUVgiv/fojomunepu.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/dddbqg9/sezivutobiwekol.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/Bifjfgg/quotation_template_microsoft_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/iO1oLid/clicker_heroes_2_free_no_download.pdfIn PDF document text
    • http://koxitasuwoxa.iblogger.org/rifizur.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/0FZsOhd/puzonakubuwonotopo.pdfIn PDF document text
    • https://cdn.sqhk.co/rapigufagi/JhaLFjb/rocketbook_pens_staples.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/ckMn9ij/revititimovotor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigazimo.epizy.com/pdf_to_word_online_converter_100_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdefa6de-adf2-4f20-a69a-dda4ee868b6b/cuantos_musculos_tiene_el_cuerpo_humano_y_cuales_son.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e69f15-c012-4247-a795-9021a1900b91/spelling_practice_book_grade_4_teacher_edition.pdfIn PDF document text
    • http://xonisuxumezitez.epizy.com/cfa_level_2_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487fe1a2-114c-4b66-9536-778e002b501f/define_alchemy_spirituality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b37ba5-886b-4145-9198-46bf6ea7428e/44505412334.pdfIn PDF document text
    • http://xasiruzate.rf.gd/dejubemakinulo.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_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5004 bytes
SHA-256: b35aec62ee30cd650a3f3e6dc3137361e9741f2acbc58036ed0983a0b548bbb5
font_01_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 9960 bytes
SHA-256: 04e5ce03950d09423d6010598432524a9593dde80a6d9931ae64ee5a7efd2624

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