Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8c4d75c05da1e2…

MALICIOUS

PDF

77.3 KB Created: 2021-03-16 22:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13d8d9ff12bcb07413753a4dd7b3ef63 SHA-1: 92159e659572729fc4edb028199c3a69db7c0a20 SHA-256: ef8c4d75c05da1e2b5103a9e3c1a002cbc9fe85f2cdfbb64a522c6876201c910
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-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://xajibur.ru/wix?keyword=plymouth+lifetime+aquatics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5fe41ffa2155e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_60050a1f7586c.pdfIn PDF document text
    • http://koprovk.xyz/gefulumebasefa9u1cq.pdfIn PDF document text
    • http://doweryklkq.space/vaxejphpl0.pdfIn PDF document text
    • http://madamzero.com/ncaa_banned_substances_creatine5xeqq.pdfIn PDF document text
    • http://vykupavto54.ru/police_car_racing_3d_game_download35jav.pdfIn PDF document text
    • http://vbnmcxz.xyz/what_is_a_reinforcing_stimulus767yc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_6050cdfa8c320.pdfIn PDF document text
    • http://neo-tp.ru/is_big_fish_games_legittb3xu.pdfIn PDF document text
    • http://newberginvestmentproperty.com/73981890441799ek.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/dell_ax510_wired_computer_speaker_sound_barxwwvk.pdfIn PDF document text
    • http://mx50off.info/4th_grade_ela_standards_ncrnyi2.pdfIn PDF document text
    • http://sedouche.xyz/cartas_de_san_pablo9wl4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5ffc5db335cd8.pdfIn PDF document text
    • http://italylife.pro/zedazufavutoboma3wbdv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_604a945fd03dd.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/nezanurugega/audioslave_audioslave_album_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/91846489372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e112779-042e-4534-8cc0-e42369120135/fenizojapeb.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/49310284653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717ec415-73e4-4c61-86d3-5d2c5dd93201/2010_dodge_avenger_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595a6df9-366e-47d3-936f-56f69ca3ae13/bezakidavilugopetake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edc4db6-f928-4e08-8ba2-eebf635278a8/48172512412.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/ruvaveramodobep.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/66237666812.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_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 5252 bytes
SHA-256: 9757a829539ddb90e69793937f24a4cb7d33a318f28eb4da0a8a19df2fdc6953
font_01_sfnt_off0001022a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022A 11148 bytes
SHA-256: 99b3505aebd7c79a3e96ad542f96e710507b884868a6841089829fd65c351cfb

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