Malicious PDF — malware analysis report

Static analysis result for SHA-256 17189eaac86bbe28…

MALICIOUS

PDF

81.1 KB Created: 2021-02-12 17:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72ac6911f1672f60db80c3f6e7430514 SHA-1: 9fd36a4f91dfb5d26954dd25f9b0c791aa82948f SHA-256: 17189eaac86bbe286110e2c038e5a8618d4d356c5266f4d7853fca4b0e772591
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by heuristics and confirmed by the ML classifier and ClamAV as malicious. The document body is heavily obfuscated, but the presence of the external URI points towards a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wb?keyword=radio/%20tv%20censor%20beep%20sound PDF link annotation
    • http://republvinb.fun/84351866027mhrax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_5fee61f01a5fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390661/normal_5fee7f09d2185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_6016df1fbaf0a.pdfIn PDF document text
    • http://justiciaforjustice.com/corso_di_italiano_gratis0hu9q.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/piahemI/smash_up_derby_cars_toy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495843/normal_6007a28d57ca5.pdfIn PDF document text
    • http://delifeschool.com/word_puzzle_crossword_clueee61r.pdfIn PDF document text
    • http://easycreditscore.info/aneurismas_cerebrais_fisiopatologiaxq5lv.pdfIn PDF document text
    • http://silvanozito.online/los_pronombres_personales_worksheet_answers1oi9q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5ff2a0afa1a74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464315/normal_5fe8e193e799e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449417/normal_5fcf4ab9b5301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mejigavukolu/attachmate_extra_x-_treme_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/showbox_apk_for_pc_bluestacks.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5160 bytes
SHA-256: 09cb70ae6790b5a4b1927ec15e4dc330628e35dba5f2769416d94bcba1cbd5c4
font_01_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 11688 bytes
SHA-256: 2bf0c198a3cb50dc462cccd7fabc7ceb31305f5fd3d6ab1ed9fd47b01be7af65
font_02_sfnt_off00012946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12946 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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