Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d10b2b94703084…

MALICIOUS

PDF

78.5 KB Created: 2021-04-04 07:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9e4d33fa41bd5c3028f3762ed473661 SHA-1: 0edb267005aa852e8f7a8f232162de03dd74a0c9 SHA-256: 27d10b2b9470308469b6af91b999cbd722f22a14ac28b3ad3a5716b094fa94c6
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-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
  • 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://jacksth.ru/strik?utm_term=what+do+resistance+bands+do+for+glutes PDF link annotation
    • https://cdn.sqhk.co/miwavilusaji/FibRhjG/47415310649.pdfIn PDF document text
    • http://olymptrade.buzz/field_trip_report_writing_formatcsv99.pdfIn PDF document text
    • http://lnstagram-helping.live/61496326463cq360.pdfIn PDF document text
    • http://lami-lashes.site/best_penny_stocks_to_buy_2021_canadaf0725.pdfIn PDF document text
    • http://fasajesova.22web.org/sozibofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_60255cd6c8a8b.pdfIn PDF document text
    • http://1xbet-registr.site/wadiletotavdn6h.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/2SrgdBQ/dapidogazovitawuja.pdfIn PDF document text
    • http://idealica-ufficiale.site/bizurifujesujufamqj031.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/icFsicP/piluliv.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jeYD7jh/fufenavojafafekafasigarer.pdfIn PDF document text
    • http://tukegutodobo.iblogger.org/6869664782.pdfIn PDF document text
    • http://goduvide.22web.org/lejopojupiwimesezifesa.pdfIn PDF document text
    • https://cdn.sqhk.co/mubutuve/gjdgilI/download_kairosoft_ninja_village_mod_apk.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/52515019073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fe7ca9da92c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/094cb4bc-50d2-4bc8-8334-35efb452888f/whirlpool_d10_water_cooler_parts.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/punctuation_practice_test.pdfIn PDF document text
    • http://kuvorewenosabe.epizy.com/sony_str-de135_protect_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8511dda-917a-4880-9961-2d7f23b63fa5/3_rivers_locations.pdfIn PDF document text
    • http://nutajowaga.rf.gd/79468286372.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 5436 bytes
SHA-256: 605addbd68e3313d85f966d5ae051dcca2d7da99296a432a59fc6cc8d160599e
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 11272 bytes
SHA-256: 7691765badc641ab1d54c5f833dd752d4e253358a4361c04f6c58d06eee807d3

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