Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8bfc69077f9b30…

MALICIOUS

PDF

79.1 KB Created: 2021-03-09 22:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bb612aeb1224fbbc698a051723ddf4a6 SHA-1: 3eb887563729840fdc5db6807830d8ccba5c60f4 SHA-256: 8b8bfc69077f9b3088b4f95330430f2ad76759d3bb0d0f9e09d7c0c3f2bc3312
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 suspicious domain. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI and the overall classification strongly suggest a phishing attempt to redirect users to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/wix?keyword=village+school+marblehead+facebook PDF link annotation
    • http://jobauthor.online/is_big_little_lies_a_book_series76jdg.pdfIn PDF document text
    • http://testvvd.xyz/auto_clicker_automatic_tap_true_developers_studiotoolsr6soy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_6016e3c518c8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412593/normal_5ffcf6ed4f4e3.pdfIn PDF document text
    • http://winclean-shop.space/ley_general_de_titulos_y_operaciones_de_credito_prescripcion_del_pagaretl7cm.pdfIn PDF document text
    • http://workshop-fb.ru/furidikowawlf5op.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_5ffcaf5876f2e.pdfIn PDF document text
    • http://agencymedia-ig.com/lojafswhvt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b342d752-9551-4bf5-8f2f-c6e7b60645cc/what_does_a_white_chrysanthemum_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/95686491249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b16033-8dd4-4183-8a66-e69bcaffcaf2/beginner_ukulele_songs_with_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/my_passport_wireless_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/a_level_maths_questions_by_topic.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/gedozovimu.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/situdikatedux.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/blank_t_shirt_template_gray.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/nacionalismo_revolucionario_puertorriqueo.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/bexadezimafenirokijo.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/zijusatugezojan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1704cf-5377-463f-a0c7-b02603a2f0e5/16054633747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2242ec-f62f-470c-872b-ec28a6b98a49/64772544257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c162a8d3-b54a-4a53-bfed-93127361c08b/what_is_the_theme_of_the_book_the_fault_in_our_stars.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/android_studio_buildconfig._debug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ef6cae-23b6-4e14-9758-d8cf1fad1f9d/windows_server_2012_download_iso_64_bit_with_crack.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 5208 bytes
SHA-256: 624a7c0c646850ac12399298e98ceab177d6a87ed05448aaf53af375b938dba6
font_01_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 10268 bytes
SHA-256: e48c0f30a11a832364e1a98c6fdff14bd1f6013f4d7e33cc1f77272ef0d1e694
font_02_sfnt_off000120b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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