Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb76fa4eaa9c8eae…

MALICIOUS

PDF

70.8 KB Created: 2020-11-22 05:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 325c488e20a12fc7ceea20c1ba9cef52 SHA-1: 97a1f711313c7490b4e68c66b4969a1cba7c019f SHA-256: fb76fa4eaa9c8eaed465c3629cd816579b89d43a298bdcefaf1a2cc9f0bfcf65
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=soundcloud+music+downloader+pro+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5f942dac965f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f8c093e29cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_5fb932efc429b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471114/normal_5fb28abf4e5a6.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/teximikamukubo/skyrim_mjoll_the_lioness_quest_won_t_start.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/treatment_of_uti_in_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a6cde7-ab96-46f1-b594-af799ba9c880/61086179461.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/spanish_worksheet_definite_and_indefinite_articles_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557e0c1b-a4dd-4e40-8017-f1aeeb0036ca/descargar_audiolibro_los_10_secretos.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/36773173162.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/a_raisin_in_the_sun_full_pages_54_to_75.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/armadillo_willy_s_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gibibu.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/taarie_s_outfit_skyrim.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_off0000d770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD770 5480 bytes
SHA-256: f32399d212ad73fa5709d19d78c70853db0254cf7248876cfe292f9209169d4d
font_01_sfnt_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 10652 bytes
SHA-256: c5fd328971584bf5de980520e873b3c7bc3a03517824204b65d875e2ca7d39a0

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