Malicious PDF — malware analysis report

Static analysis result for SHA-256 589045490421510e…

MALICIOUS

PDF

93.4 KB Created: 2021-02-23 14:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 885fca6afbfaacd3ccd674367b880fc1 SHA-1: b6508ce32abc5339fcc38cff154ddcb14652d6ee SHA-256: 589045490421510e250b54b7f7a1a532fb3dbbaa900d785aa100b70e8620ae09
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a malicious redirector link and a high ML score. The embedded URL points to a known malicious domain, indicating an attempt to lure the user to a harmful site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=how+to+put+string+in+stihl+fs+56+rc In PDF document text
    • https://cdn.sqhk.co/zegetaru/efwia06/nickelodeon_kart_racers_2_grand_prix_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fcc83051a007.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/hgscjek/swipe_and_color_fill_3d_challenge.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/CsmX8he/optical_illusion_tattoo_on_head.pdfIn PDF document text
    • http://firstreadersclub.com/types_of_chemical_bonds_worksheet_answers_cacl2g62p9.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/ghOiTie/51063177611.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/ghhhnxX/36748238619.pdfIn PDF document text
    • https://cdn.sqhk.co/gupikekarobo/hbvqxAG/playerpro_music_player_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/ivVihBn/38157321636.pdfIn PDF document text
    • http://fb-ig-copyright.com/nezijugenilifamajisevokozh1d7n.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/gI5YJhb/draw_a_stickman_epic_3_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_600d01177d7cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fe1d661eeb3d.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/fLhcFgi/listado_de_juegos_retrocompatibles_xbox_one.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/zatazewoz/nojeb.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/20025118174.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/mental_addition_worksheets_year_3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 5396 bytes
SHA-256: eee128105f724ef6b51ae3c11832c5a08ae22bbdc06a6fb8a02cc8a32bd8767b
font_01_sfnt_off00012d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8D 11168 bytes
SHA-256: 4d469925aa8ece44a0e4414d59c02921f690d672121c586f97392754ce9aa9eb
font_02_sfnt_off000152ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152EE 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06

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