Malicious PDF — malware analysis report

Static analysis result for SHA-256 31429c71f78ddbe7…

MALICIOUS

PDF

78.6 KB Created: 2021-04-08 00:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 95b0245dfbc0adfe9d73fd7b42cfdeae SHA-1: 42ed6666d3797b6ac239627855b57e36d1d5818d SHA-256: 31429c71f78ddbe7d95dac476253538f49dcd37eaa1eb8028abc51fd4a00eeba
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 0.9997

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://maypoin.ru/wix?keyword=incomplete+dominance+worksheet PDF link annotation
    • https://cdn.sqhk.co/sifalavuxozo/g4Mjeid/1_to_100_numbers_spelling_chart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fdf9539357ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_606cab24b7715.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5ff974b6ad52f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384644/normal_6007e948b1d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_605959ee119b1.pdfIn PDF document text
    • http://goldenframecollision.com/can_quantum_physics_predict_the_future61mpb.pdfIn PDF document text
    • http://kokilubowo.22web.org/kels_assessment_form.pdfIn PDF document text
    • http://varistop.site/sotatafazakixomumug16ljr.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/how_to_troubleshoot_an_rv_ac_unitlh5nt.pdfIn PDF document text
    • https://cdn.sqhk.co/xidosisew/jgdmihl/head_soccer_la_liga_2019_hackeado_apk.pdfIn PDF document text
    • http://torchqbfl.fun/38176791067ea1ki.pdfIn PDF document text
    • https://cdn.sqhk.co/zixagiko/OgfCjdA/66072921109.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/didfgc1/download_game_last_hope_zombie_war_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/vscb3ie/color_muse_review.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/lokijuronig/adding_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/what_am_i_riddle_answers_46.pdfIn PDF document text
    • http://zexosowaluzu.epizy.com/tariro.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/what_size_wiper_blades_for_2007_honda_odyssey.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/brain_teasers_game_apps_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/fiwigotukiguwafes.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_off0000f370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF370 5404 bytes
SHA-256: 5861dd0f232d031540095f764a4ffcf861a460829191bbfdad6d62aa4acf81b1
font_01_sfnt_off000105b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B6 11644 bytes
SHA-256: 4137d81d3dfca6015a366eb5e1ef2c9e23d8ce92315215143e0da5f30a8eb7eb

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