Malicious PDF — malware analysis report

Static analysis result for SHA-256 1186c9d58450e96e…

MALICIOUS

PDF

72.2 KB Created: 2021-03-10 04:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a75c02b3297cfae230feeab73917bb1f SHA-1: 72fd7617eb7e5b2d2f61c847e18e89b2b672f446 SHA-256: 1186c9d58450e96e125b2e520f9564aceab233523eb8bb306853de76032edeb3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9880

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/award?keyword=cantico+espiritual+san+juan+de+la+cruz+pdf PDF link annotation
    • http://tufodudem.mypressonline.com/excelsior_orthopedics_transit_road_east_amherst.pdfIn PDF document text
    • https://gapurosudezejug.weebly.com/uploads/1/3/5/9/135965954/6109292.pdfIn PDF document text
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/7994f9dfe.pdfIn PDF document text
    • http://3gusevshop.space/35685138806mu9bx.pdfIn PDF document text
    • http://qiwi-wallet.online/sample_1st_birthday_invitation_templatesw7sjj.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/what_books_are_coming_out_in_december_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/ha3ifie/cruise_ship_industry_news_today.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/nasupaganatel.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/19389005566.pdfIn PDF document text
    • http://kino-vezde.ru/can_cricut_expression_2_make_shirts1vf1z.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/636e168.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/gcznIji/bazefurepomod.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/0DhdheO/71766052712.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/xelixus.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/Nbhj2gu/fowasijisolamomemokikub.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/10410444534.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/tufitijinexu/93850551241.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_3bda62d47d174680985b02d0d16faf59.pdf?index=trueIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/history_egypt.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/llm_guide_oxford_mjur.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_83f18e8b76374b30a6427f8f3b7dc8b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/computer_related_full_form_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/84392812469.pdfIn 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_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 5180 bytes
SHA-256: ea5ea8c9ed17bee1f51b87953c3938986a88b38a9b1a35459a4e18bba2f8c0d2
font_01_sfnt_off00010363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10363 11448 bytes
SHA-256: c086cdc64a6ab011b08586f6711ead15514c09bad21586005ce6fef7ce20fdeb

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