Malicious PDF — malware analysis report

Static analysis result for SHA-256 4906d35bb387273c…

MALICIOUS

PDF

80.5 KB Created: 2021-04-23 16:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 011bf0aa1795dcf89420c366a589d847 SHA-1: 583ffbaf4fa6afe9b1ca73198197da8454a61456 SHA-256: 4906d35bb387273c206fa3fd733e188ec2583916a9c13973be80cefd1d95c9aa
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=what+do+inklings+eat PDF link annotation
    • https://cdn.sqhk.co/baruduwege/agib0id/free_powerpoint_software.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/bicol_history_and_culture.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/2gcjiI7/reweni.pdfIn PDF document text
    • http://eroganoficial.site/587212185367oyq8.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/descargar_diccionario_ingles_espaol_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jOkijh5/xugelugave.pdfIn PDF document text
    • http://ig-mediateam.net/nitoputixuselmsh.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/a2f9f63696f0.pdfIn PDF document text
    • https://jalesebexiw.weebly.com/uploads/1/3/0/7/130739560/3664904.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/447ac648e4b71.pdfIn PDF document text
    • http://filanion.online/1745554046v4ntr.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/jahb43q/world_cup_1986_argentina_team.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/4193763.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/1957443.pdfIn PDF document text
    • http://shmelev.pro/do_you_need_quotes_for_paraphrasingheh94.pdfIn PDF document text
    • http://koparikamoze.scienceontheweb.net/actual_speaking_test_2020_download.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/lumixi/19411453229.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/pomifodufulofifojodova.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/13013430718.pdfIn PDF document text
    • http://wugetad.myartsonline.com/44899537430.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/11457119530.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/46520966117.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/usda_corn_planting_report.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/the_making_of_a_poem_a_norton_anthology_of_poetic_forms_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/mrs_spring_fragrance_summary_sparknotes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 4856 bytes
SHA-256: 726ae64c9345eb16569b62c07fc6dcedd2c70511734eefdf4da2cfacb2e3f40d
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 11348 bytes
SHA-256: 71a4d550e50bee6d739e1ab9d06b65e7626595e05a0a554117a0a4cb92b8383b
font_02_sfnt_off00012671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12671 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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