Malicious PDF — malware analysis report

Static analysis result for SHA-256 658714ea523856ef…

MALICIOUS

PDF

73.7 KB Created: 2021-02-17 16:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6d9a7967f788bc7561bab158ab5e99b5 SHA-1: e4dbd45f1dd6f3916c8621b5a21f22e90ea53fb5 SHA-256: 658714ea523856efff35922b94ba58d1afd1ece53ef8217158574638568f9d63
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The file is a PDF that contains a lure for remote support tools, as indicated by the 'SE_REMOTE_SUPPORT_LURE' heuristic. It also contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://jottigo.ru/123?utm_term=how+old+is+young+noah+in+the+notebook PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381104/normal_5ffd02973fc57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415331/normal_5fc9cbfc0d760.pdfIn PDF document text
    • http://arenda-comp.space/teamviewer_quicksupport_download_for_windows_10pymqj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490519/normal_6019675688422.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/lizevabedezituleyjl6m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_60054e2b320af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_60033f0a7059a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497081/normal_6006b8e43c7a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5ff0d74d796df.pdfIn PDF document text
    • https://cdn.sqhk.co/rotelizedo/h3ihjay/word_game_apps_that_pay_real_money.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/heifUjb/smartwool_base_layer_250.pdfIn PDF document text
    • http://nazhivy.net/myers_psychology_for_ap_3rd_editionh79c8.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jgiY10L/defefomamuguzonel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5fe9936c82953.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/dazuxujepov/wifad.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/jifaxariledunolonijolel.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/88625324123.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/78956293549.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/jafuravinusodesupobedobed.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_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 5352 bytes
SHA-256: 2f80a81102bf3adbeebdc47add284705bd68b1d3495011d1717039bf3ec876b3
font_01_sfnt_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 10292 bytes
SHA-256: 92fccf872b0437d25aa347d73e05d99e87288ee8d6d399096b81104584c3708a

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