Malicious PDF — malware analysis report

Static analysis result for SHA-256 539c8d5e860a6770…

MALICIOUS

PDF

76.8 KB Created: 2021-01-21 14:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a13c10f2867574f149e3361ac54b86fd SHA-1: e41e7b00eace7edeb41ecad7a566ed198e0a0116 SHA-256: 539c8d5e860a677065bf5accdfe7d61eab90e2c45e78194f67fbd57d249ed885
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malicious content delivery attempt. ClamAV detection and ML classification further confirm its malicious nature. The presence of an external URI suggests an attempt to redirect the user to a potentially harmful website, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=business+model+canvas+value+proposition+pdf PDF link annotation
    • https://site-1184420.mozfiles.com/files/1184420/table_tennis_rules_game_point.pdfIn PDF document text
    • https://site-1178004.mozfiles.com/files/1178004/nail_art_stickers_meaning.pdfIn PDF document text
    • https://site-1167978.mozfiles.com/files/1167978/brick_builder_website.pdfIn PDF document text
    • http://jufidozotazi.66ghz.com/cinema_xxi_streaming.pdfIn PDF document text
    • https://site-1167925.mozfiles.com/files/1167925/nojobekusomosepitadapoxi.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/diwitu.pdfIn PDF document text
    • https://site-1174552.mozfiles.com/files/1174552/63618465218.pdfIn PDF document text
    • http://zaxofebejip.66ghz.com/iwsva_6._5_sizing_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f98231a8e058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakef/e_balbharti_question_paper_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/accelerated-_mobile-_pages-_amp-_for-_wordpress_free.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/37699293127.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/android_version_for_samsung_s6_edge.pdfIn PDF document text
    • http://zaximibirada.epizy.com/kudivododoxaliru.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/guide_gnie_des_lieux.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/lasebimol.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/serie_der_lehrer_episodenguide.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/iters-_3_score_sheet.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_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 5412 bytes
SHA-256: 4474056129c1f8d27eb9dbd70b4daa5744fd5cb259a376b6a1318dfa5b7e717a
font_01_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 13280 bytes
SHA-256: 70c3fd9203899a3619d1fb3f045b6130756b10f6d961a665ee989bcbba29a736

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