Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1540bea8d5b82d…

MALICIOUS

PDF

76.9 KB Created: 2021-03-31 23:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f45b944bbda82da3daaf4328f1812f3 SHA-1: 54c5d665f30941c4c863203d67b8ee6a4d227f52 SHA-256: 9a1540bea8d5b82de4aee22b6a543dfc095e48aab0df2c1cfb3cc98a083d977b
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/award?keyword=award+certificate+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410018/normal_600bec702add7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_6036c41a1910d.pdfIn PDF document text
    • http://sokfresh.fun/gofilemunapenatejebolofexm7g2v.pdfIn PDF document text
    • http://dirtygirl.fun/regidosokakawareveginehvk4m.pdfIn PDF document text
    • http://natur-bio.space/678950461217xjbv.pdfIn PDF document text
    • http://insta-sale.site/447186826324pgov.pdfIn PDF document text
    • http://m-laskin.ru/answer_back_horn_nissan_altima8rxyx.pdfIn PDF document text
    • http://artrosil.xyz/clearing_fractions_equations_worksheetqpza1.pdfIn PDF document text
    • http://gufutaca6.xyz/69020348819w4teg.pdfIn PDF document text
    • http://nowtorrentz.com/84015569557cdnmc.pdfIn PDF document text
    • http://maturibcgj.space/samsung_un40eh5300_updatefkjty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_601b6436f414a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe9f082092ae.pdfIn PDF document text
    • http://speak4pro.com/windows_10_offline_isoa5l1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_602e65d69ee79.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/vexosafugunu/iphone_5c_price_in_uae_carrefour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ed8331-c283-4bd1-a1be-c5003a67ad77/74046910965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d4071e-fedb-4270-8ac5-96bdadc8ffdc/juz_30_quran_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/kibogubolepov.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/likowo.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/setool_box_3.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/leave_letter_format_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/37062518961.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/place_value_printable_games_ks2.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_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 5020 bytes
SHA-256: 35f2a00df5a7bcfc214e0ab9715828b51839c7cc3184a1d54f2ad03a79dffe2e
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 10884 bytes
SHA-256: b1776cb0b393927e8a1ef7452f8259aec87075330cd3b8ce372eeb901a393c3d

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