Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb86af2f3c8eec5…

MALICIOUS

PDF

68.5 KB Created: 2021-03-27 17:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 63d72255bf697cbc34207e4b651213d7 SHA-1: 2a68e46b952e748a6d5034346aac42412e2ac3a2 SHA-256: cfb86af2f3c8eec5cd15bd59c063252d81c21f8a4036883d8f68a76a01ddc7fa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://resalured.ru/123?utm_term=free+air+raid+siren+ringtones+for+android PDF link annotation
    • https://cdn.sqhk.co/wesaduleb/hdoe5if/dafelitilupomizugu.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/biejijf/wekuj.pdfIn PDF document text
    • https://cdn.sqhk.co/dojagomudek/aXmAjgp/67237099368.pdfIn PDF document text
    • http://vulubibobi.iblogger.org/ikea_worktop_installation_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jiUDjf0/new_york_state_fall_foliage_report_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/bhz6jZg/peneme.pdfIn PDF document text
    • https://cdn.sqhk.co/dasotipamu/hflidtL/reporte_de_circulo_de_credito_condusef.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/goigjhh/download_alien_zone_plus_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/cgjQgcp/64676214443.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/uiahdhb/11338654000.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/tulovasotajevo.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/29344386906.pdfIn PDF document text
    • https://cdn.sqhk.co/panuwatosim/ogd07ia/wevopevoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/Eihhhja/risebodomig.pdfIn PDF document text
    • https://cdn.sqhk.co/ninilevikod/RheQXfN/spell_street_lights.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bipofixijanafuf.rf.gd/komokejada.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/97757048834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a183990b-0215-4d96-81f6-69aa4d3938f1/gekepapumomimukupix.pdfIn PDF document text
    • http://rikonobawo.epizy.com/14527543363.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/assam_tet_free_guide_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7080473-382a-4d9f-95b0-fdbe6ee5b8dd/how_to_fix_a_frigidaire_washer_that_wont_drain.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_off0000cf91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF91 5000 bytes
SHA-256: df3a6ab55b12eedbe39a910ff976ffe4be580d9c05bc2cea61f7964ca0e28cdb
font_01_sfnt_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 10500 bytes
SHA-256: 75cbf622bfa96b2fabe09744d5869417ba26d159110e33b64c2419024f5913db

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