Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2960d90cfa1fc60…

MALICIOUS

PDF

67.6 KB Created: 2021-03-29 06:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e06b8ab37bfba2d2d25daa99eae3f631 SHA-1: c5bda1bbde38dc621c5a9eb01ad3c8a8344d5b04 SHA-256: b2960d90cfa1fc60511923769b2735e53e90e16445f598eeb70adf2f06548bcc
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 0.9830

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://baarspo.ru/aws?utm_term=jam+chill+out+speaker+how+to+use PDF link annotation
    • https://cdn.sqhk.co/mojesoje/fGjaEhe/97717820857.pdfIn PDF document text
    • https://gonewama.weebly.com/uploads/1/3/4/0/134095907/3210093.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/TihuIyJ/nco_guide_study_guide.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/1a30643abd315b.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/shafarevich_algebraic_geometry.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/RgfjivF/degusexe.pdfIn PDF document text
    • https://xapefawisago.weebly.com/uploads/1/3/4/7/134771693/tugegenofelisu.pdfIn PDF document text
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/6169281.pdfIn PDF document text
    • https://cdn.sqhk.co/saxamabewido/jebGhjc/23623976871.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/a53b601.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/jomaderopazosuxuzokiteb.pdfIn PDF document text
    • https://cdn.sqhk.co/tufiroxova/akB6hg3/65748496695.pdfIn PDF document text
    • https://rupokolox.weebly.com/uploads/1/3/0/8/130813141/nabanitedonivur.pdfIn PDF document text
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/jibevawogujuvivul.pdfIn PDF document text
    • https://cdn.sqhk.co/kesufetumo/jyjnhh9/wubuxifesojakuxamifoxud.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikifefisu/TZHf3gj/buffalo_nas_software.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/jhJhiBG/lorejoloso.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/hhWgdqo/round_rebounce_ball_hop_bowling_green.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejarisiwudu.atwebpages.com/is_intermediate_micro_or_macro_harder.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_4151a511a3364505af9c44f3422441e8.pdf?index=trueIn PDF document text
    • http://tediguku.atwebpages.com/simon_ielts_essay_topic.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_f8ee046cefda41c9b9859fa71a527917.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 5320 bytes
SHA-256: f408c23a2c6274fc4f7c61a840ae5ad5cca192457757ee40c4a0ecd9107e0934

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