Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce28cb31561b9604…

MALICIOUS

PDF

79.7 KB Created: 2021-03-16 04:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 708e0168ad1beb38a3d47bd5c9383a28 SHA-1: 977affb0222d2917fbb4a1dead3f584d7ee4b74a SHA-256: ce28cb31561b960412054ada9c1b6c321c2722c5e4f6360b053c4a5fc267557e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link suggesting a search for a book PDF. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings or distribute malicious content. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=the+hundred-year+marathon+book+pdf PDF link annotation
    • http://meziradidanaru.iblogger.org/41383504094.pdfIn PDF document text
    • http://bududusawuwepi.iblogger.org/38596310748.pdfIn PDF document text
    • http://xiwasaruv.66ghz.com/batman_joker_movie_tamil_dubbed_free.pdfIn PDF document text
    • http://fusizexa.22web.org/arizona_legal_document_preparer_study_guide.pdfIn PDF document text
    • http://rufojoto.22web.org/skinnytaste_cookbook_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_6cdc6264380b4be2aa2ef027c0fa707d.pdf?index=trueIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_a4eebd0922774d669b256a436b9708ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/cambridge_latin_book_2_answer_key.pdfIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_e6156eb6866343bda15951598329797e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saxefi/dyson_v7_animal_cordless_vacuum_cleaner_best_price.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_718216a7407b4be2a2619e1f5cd6909c.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_77e1baa5769a44c79fc6993b0dd9552e.pdf?index=trueIn PDF document text
    • http://gelutusuxipedib.rf.gd/bangla_tv_apps_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/sbi_duplicate_debit_card_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/daboko.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/modern_ballet_performances_new_york.pdfIn PDF document text
    • http://xetafenup.rf.gd/franck_sonata_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/adskip_apk_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/parallel_perpendicular_intersecting_lines_worksheet_4th_grade.pdfIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_73bbc52f5ff84b139de4a42e4a9a76ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/10484281541.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_514f1c80111d42d6ab6f93e2a692c6c4.pdf?index=trueIn 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_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 5356 bytes
SHA-256: b398274536c04309b69dc5d56ec571a34a5a246b792589c43f25b44ce7fe99d8
font_01_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 10664 bytes
SHA-256: ae6cce34473fdf38a98c1bc5a244824de5b8e644e8e610ceb1a72366a56db537

Open this report in the interactive analyzer, or submit your own file for analysis.