Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a7d99cc0391039…

MALICIOUS

PDF

70.7 KB Created: 2021-03-21 00:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 69e153fde1bcd1703294325699cc5d36 SHA-1: f8a20ca8278c70ecd3bb923459c189189853a7a2 SHA-256: 57a7d99cc0391039eff30ebb8eafe186dc63ea7368576c935bf31c9af0e72784
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://resalured.ru/award, which is likely used to deliver a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8698

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
  • 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://resalured.ru/award?keyword=words+bee+gees+piano+sheet+music+pdf PDF link annotation
    • http://tixaman.scienceontheweb.net/piano_scales_notes.pdfIn PDF document text
    • http://akmurzina.com/mizipamasadenomapazadernmkp.pdfIn PDF document text
    • https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/cebb295de7c8c2c.pdfIn PDF document text
    • http://fenemixov.iblogger.org/graco_sweetpeace_swing_replacement_parts.pdfIn PDF document text
    • http://kivesiso.iblogger.org/health_information_technology_salary_2020.pdfIn PDF document text
    • http://cafe-cok.ru/langston_hughes_birth_datewm33b.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/3512bc1c0.pdfIn PDF document text
    • http://mishabelle.ru/tubote6ihq4.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/3715927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merizipu.rf.gd/english_free_printable_worksheets_for_kindergarten.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_814c8f180d0d4147a494a23eae74ec99.pdf?index=trueIn PDF document text
    • http://ginokiximoz.rf.gd/how_to_cook_a_large_brisket_on_the_grill.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/aromaterapia_energetica.pdfIn PDF document text
    • http://fetenebepoxoso.epizy.com/16133673792.pdfIn PDF document text
    • http://xodupope.epizy.com/emerson_thermostat_light_not_working.pdfIn PDF document text
    • http://kidereludabiron.epizy.com/pejekojenamataxu.pdfIn PDF document text
    • http://bubotelerokuz.rf.gd/how_do_i_find_the_factory_code_for_my_sentry_safe.pdfIn PDF document text
    • https://36ba0bd5-485c-4bd5-924f-6a5e18dcb854.filesusr.com/ugd/96419b_2bcd9d0353544871b8ac5a3813c25d87.pdf?index=trueIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_f2f5f1f2b35d4859865265b2dd153510.pdf?index=trueIn PDF document text
    • http://tijiwef.epizy.com/wavozivuruvomajukitonaz.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_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 5572 bytes
SHA-256: 094280f67fad78002df25167b80047e0fe8861c1e86eedec12126164ab9b8a0b
font_01_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 11648 bytes
SHA-256: 40a28cfd60016ae3e7eb07feb1446ada9b6c3426b3ecff2edd596b9464d82406

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