Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64b87ea472e0785…

MALICIOUS

PDF

80.7 KB Created: 2021-03-17 03:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8b0ffc6dd49a864e027c2abf04c66b0f SHA-1: e6e6164f14dde71adf4a71db5411e54cbdfeae24 SHA-256: d64b87ea472e0785eb05a9b16fed5a36b5b652f465b7299f380701b83fd03487
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a domain associated with malicious activity. Heuristics indicate this PDF is a link farm designed to redirect users, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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
  • 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://maypoin.ru/strik?utm_term=hamilton+beach+coffee+maker+best+buy PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488346/normal_5fdcf0814a7f5.pdfIn PDF document text
    • https://mugabezimezik.weebly.com/uploads/1/3/4/2/134235171/wekarisi.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/mozilamobonapo.pdfIn PDF document text
    • https://nanawoxemataxu.weebly.com/uploads/1/3/5/3/135332584/viniwifonem_wagurodugewuro.pdfIn PDF document text
    • https://faxigokoge.weebly.com/uploads/1/3/0/7/130775726/e21428a030f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_602110c043bb9.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/bodybuilding_diet_download.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/fd15be8d1e681.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/bissell_green_machine_instruction_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469623/normal_5fcc45f2513ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_60112b14c541f.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/bipasosuvuwerukajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_601bcbbbaab94.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/kitchenaid_stand_mixer_blue_ice.pdfIn PDF document text
    • https://bukuduribo.weebly.com/uploads/1/3/1/4/131454389/puxikerelarus_tozebutewed.pdfIn PDF document text
    • https://tunikasas.weebly.com/uploads/1/3/1/4/131438809/segaxozavunafet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fc872e55a8fb.pdfIn PDF document text
    • https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/zenuxujixegal.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/77468009835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_60146af1b11a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5fee4bd9c8d69.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/sakaburepagase/framingham_risk_assessment_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/make_your_own_cursive_handwriting_worksheets.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/bell_jar_book_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/cell_cycle_and_cancer_virtual_lab_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/witudaxewavunubojitu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/pebokituxakal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 5388 bytes
SHA-256: f7f05227ceeca96cb7f7f6b3c0224c931765855064235d09caff7271c83b9599
font_01_sfnt_off00010f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1D 10728 bytes
SHA-256: 95d5c8d6a9412fd811400891812c34ae492e8b8aec1d5ec54d83c4f4015dc8ef