Malicious PDF — malware analysis report

Static analysis result for SHA-256 6919f2bdc6febcef…

MALICIOUS

PDF

74.8 KB Created: 2021-02-08 07:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 58fce238cf18da93e72ef1c98162b71b SHA-1: 00c38c4a66c81fec65f13548b3412eff369fbac0 SHA-256: 6919f2bdc6febcef1bf954710418d22d5666647ca58241c29244b087223c95d1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/aws?utm_term=dietary+guidelines+australia+2018'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/aws?utm_term=dietary+guidelines+australia+2018 In PDF document text
    • http://summer-italy.fun/super_archery_shooting_target_shoot_rescue_cuttere8upt.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/jE0jhQW/70053447263.pdfIn PDF document text
    • http://scriptbook.xyz/benefits_of_delegation_in_nursingjehph.pdfIn PDF document text
    • http://teenagetutor.net/free_rear_view_mirror_hang_tag_templatewru0w.pdfIn PDF document text
    • http://beremoter.online/slither_io_hacks_mobilezz2qy.pdfIn PDF document text
    • http://cyberghost.store/learning_actionscript_3._0_a_beginner_s_guide1uxd1.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/idjg6Uk/gukumipagogedoxom.pdfIn PDF document text
    • http://kozlo.space/7847266293715x4z.pdfIn PDF document text
    • http://kamaz-ftc.com/94563415819a51st.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/ckgjPKV/basketball_shooting_hoops_games.pdfIn PDF document text
    • http://lestyprin.online/bein_sports_turkiye_ligi_ozetlerif2brl.pdfIn PDF document text
    • http://ubsvp.com/family_triangulation_worksheetmigkb.pdfIn PDF document text
    • http://keto-s1.com/kalezokimexudosg49e.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/ifih1gd/nuwotutadefomilepuzuw.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/rokuwapesu/set_jdk_path_in_android_studio_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/52070718561.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/spring_boot_test_rest_controller_resttemplate.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/rarukon.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/10729532097.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/62236957334.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/december_1_2018_sat_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/rukagev.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_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 5612 bytes
SHA-256: 4907ac6e15817b4f464f1dd1c12cf33e0d238719ec50624dd9f60ab6bb0f0b46
font_01_sfnt_off0000f9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FA 10548 bytes
SHA-256: c8e994aa3d399cb8e1ae9cb32ddb9610bd8a68cca95d71afa5f092ce2808c9f4

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