Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f53a2d4a020d6a9…

MALICIOUS

PDF

159.7 KB Created: 2021-03-30 22:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3963adf97f3fd37e6922b65d45ddd33 SHA-1: 74ef7259b1aa65645ee48555021bde478f51b9a2 SHA-256: 9f53a2d4a020d6a9430ae0a3b9aa6ccb0b89fdc824efb431d1570f12f0b4abaa
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting a lure. No scripts were extracted, but the PDF structure itself likely contains malicious JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/award?keyword=benznidazol+mecanismo+de+accion+pdf
    • https://cdn-cms.f-static.net/uploads/4380876/normal_605c4f68ded31.pdf
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fee903d05bf5.pdf
    • https://cdn-cms.f-static.net/uploads/4423696/normal_605df3ac063bc.pdf
    • http://xobazosapiru.22web.org/giwegamufumuma.pdf
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/puruvogib.pdf
    • https://rewovokikulige.weebly.com/uploads/1/3/1/3/131379935/0f9d6e8956.pdf
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/xejimovilisus.pdf
    • https://cdn-cms.f-static.net/uploads/4475564/normal_60584d659c969.pdf
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fd28a064c2c2.pdf
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/5318352.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nefunupu/android_animation_list_programmatically.pdf
    • http://jiwepatifon.rf.gd/dixeregufu.pdf
    • http://xorabaza.rf.gd/bise_sukkur_inter_result_2020_download.pdf
    • https://s3.amazonaws.com/lekelepowo/attending_physician_s_report_form.pdf
    • https://s3.amazonaws.com/pulavokaxe/sirajefogifulevujeniwud.pdf
    • https://s3.amazonaws.com/foneniz/50982574024.pdf
    • http://dekixugo.epizy.com/95912175550.pdf
    • https://s3.amazonaws.com/sugowubuf/ethiopian_journal_of_health_sciences_authors_guideline.pdf
    • https://s3.amazonaws.com/satuja/arnold_chiari_malformation_1_radiology.pdf
    • https://s3.amazonaws.com/lopadivupudexa/link_video_er_app.pdf
    • https://s3.amazonaws.com/wulagisi/thinkorswim_web_level_2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022677.bin
3ccdcc0ce7a7034b446658806e1f971ebef664152a8f4a328f31196d18e8fa98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22677 5012 bytes
font_01_sfnt_off0002376e.bin
2c78397e0c80ed52306442ddde41a6ffa3c3f154b2cee888cec11b7c0119a0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2376E 13736 bytes
font_02_sfnt_off000262a8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x262A8 4324 bytes

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