Malicious PDF — malware analysis report

Static analysis result for SHA-256 cefb02c52a7b91f5…

MALICIOUS

PDF

82.4 KB Created: 2021-04-06 23:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ff73e52c0729622401005045bd5e6d5 SHA-1: b4bc12d1c12eb102a1fd265ab1fa1e4f6a90f8f0 SHA-256: cefb02c52a7b91f56aa704409049389d6d05a1805e0908e0b38f067862f6d7e9
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user, and an external URI pointing to a URL containing 'award' and 'template' further supports this. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the presence of external URLs indicates a potential download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://leonvi.ru/award?keyword=blank+tri+fold+brochure+template+pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://vezerfa.xyz/zatizidejuhi.pdf
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5ff71868362ae.pdf
    • https://cdn-cms.f-static.net/uploads/4381740/normal_601a542c49f69.pdf
    • https://cdn.sqhk.co/mabisurud/fFGFjeQ/49071031477.pdf
    • http://zizoxuviwemaki.iblogger.org/eucharist_catholic_answers.pdf
    • https://cdn.sqhk.co/wanukawuwota/dpjbieo/cruise_ship_companies_list.pdf
    • https://cdn.sqhk.co/vetelovube/i6he4ja/miwezetunarekisul.pdf
    • http://kulinar2020.site/chuka_full_movie_downloadfdwzt.pdf
    • http://svoytrylend.xyz/18066040406me8cp.pdf
    • http://sibuvre.com/86221866319skc45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_3f5429d4ef5145ef86dd1fc2d09974fb.pdf?index=true
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_efa25947ecfd44ce9483f3bf79ec846e.pdf?index=true
    • http://jonebitomire.rf.gd/asme_2019.pdf
    • http://vuremekewema.rf.gd/fasibosawi.pdf
    • http://rirazito.epizy.com/weight_training_for_beginners_at_home.pdf
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_fcecf15dabce446ca3075cc58a878e71.pdf?index=true
    • http://vizaraxeforuzu.rf.gd/carel_ir32_user_manual.pdf
    • http://vuxujakovonad.epizy.com/palm_beach_gold_coast_fishing_report.pdf
    • http://godavuvexo.epizy.com/sonocent_audio_notetaker_free.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_off0000f817.bin
d90fb631b971f5ef0cf02eda38cf4755c76e366b95061db89994cea2aa96f97e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 5352 bytes
font_01_sfnt_off00010a11.bin
1c3449250edd5021960dadf34b7a5fc6d820fa71d4b7cd05071bfa27dff84ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A11 10632 bytes
font_02_sfnt_off00012e31.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E31 4324 bytes

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