Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4cc9280e65c58c…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 16:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 79595319d4802f8f7688e4ad1a64204e SHA-1: 8cf3074502587c70f6472d4b5c4004b1992a2733 SHA-256: 3f4cc9280e65c58c0db3f1a60a1b7dba4ca71d26fd3ab4b3220715d330909f1f
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://baarspo.ru/wix?keyword=keurig+compact+instruction+manual', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a pretext of providing an instruction manual to trick the user into visiting the malicious URL. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attack.

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://baarspo.ru/wix?keyword=keurig+compact+instruction+manual PDF link annotation
    • http://oneitshop.pro/the_book_thief_ebook_download_epub9oish.pdfIn PDF document text
    • http://sobakin.space/the_last_jedi_watchjct1p.pdfIn PDF document text
    • https://cdn.sqhk.co/wokiwife/ghahJTv/13624518051.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwami/ojahjUt/53116872753.pdfIn PDF document text
    • http://smcjd.com/ctet_form_fillflh1r.pdfIn PDF document text
    • http://pressit.space/the_circulatory_system_worksheet_answers_keyefejc.pdfIn PDF document text
    • https://cdn.sqhk.co/tekemozuj/ahhjiji/30443725340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ec058b-82b4-4045-9227-c9e7199c530d/53951071308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ee2fb1-f5aa-45e6-a6a1-5fd1fd331c79/pisinisose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e67afc8-90b4-4912-906d-50a09d66dc04/83353304834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bddc66c4-18c3-4013-8632-05d81b5ba706/how_to_draw_anime_for_beginners_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/mowesivedapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8fac444-15a9-4d79-9ace-2899302936d3/55417890218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae8f700-9fe4-465a-9f29-b8248b5e48e8/sewekovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7814fe7-23f2-4f3d-b308-629329ebcb47/shark_euro_pro_x_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/nobari.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/industrial_revolution_vocabulary_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/piriformis_syndrome_exercises_for_elderly.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/who_is_the_most_important_character_in_a_midsummer_nights_dream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca022c5-a5eb-4fcd-a88a-e7d8c52cb44e/66638479778.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/xapovimutogubinefedogiso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 5224 bytes
SHA-256: 6a1870d095195bef06a3091a9d03b227910d1bf737286f50064587a0cfe3d479
font_01_sfnt_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 10808 bytes
SHA-256: 40b0b3ba6ce0e361651388583a0aaf3bfd334780b1e224ec0a8176a011cc63d9
font_02_sfnt_off0001133e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133E 16096 bytes
SHA-256: 605d9e4239b974f6d9e1de1faf493610cf9608543c7c5495bf40ce0088b12bce

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