Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7ccf067d92544d…

MALICIOUS

PDF

80.0 KB Created: 2021-05-02 10:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f4657e8625b78e7b00a3195e95adeaac SHA-1: cadb7b64d41a8373e289bcf1cc463665b51f2bf1 SHA-256: 5a7ccf067d92544d4a3d7edb0435397cdc9217e7c6a48458f8563d3e6be017ff
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.6520

Heuristics 4

  • 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 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://zajinet.ru/strik?utm_term=volume+of+cubes+and+cuboids+powerpoint+tes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366344/normal_606d13493f1e1.pdfIn PDF document text
    • http://cooldomen.space/apocalypse_worldivz5r.pdfIn PDF document text
    • http://bigno.space/stree_movie_download_in_hindi_2018_f9nvas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600a501194965.pdfIn PDF document text
    • http://ellmax-site.xyz/who_is_the_father_of_progressive_educationf7k6n.pdfIn PDF document text
    • http://rumepado.mypressonline.com/analogy_exercises.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452834/normal_605c97ef8d291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5ff3e661ae2bd.pdfIn PDF document text
    • http://about-fb-support.com/45268733173jys4t.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/yard_machines_rear_tine_tiller_parts.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/gaxusuran.pdfIn PDF document text
    • http://robolab.one/81055814891em511.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/48266687609.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/sires.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/19389005566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_6005e6a9c47e7.pdfIn PDF document text
    • http://instasale.company/diferencias_y_semejanzas_entre_animales_y_seres_humanostczm2.pdfIn PDF document text
    • http://detonicufficiale.website/99900340354v1mnd.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/xezonijida/2531726122.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/11389063580.pdfIn PDF document text
    • http://moxosutemow.onlinewebshop.net/25650994692.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/litozujixeninani.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/wamuwurigim.pdfIn 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_off00011a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 5380 bytes
SHA-256: 681efc142d1dc74b388c9da87d07ad5afca86b64c5d1b74ad611e68103a4f2a8

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