Malicious PDF — malware analysis report

Static analysis result for SHA-256 a121c84ae119c7e4…

MALICIOUS

PDF

75.9 KB Created: 2021-03-16 19:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46a01b7d6af09e75afd573be6832bb52 SHA-1: 10b49f538bebdb15b1426282b7daf08ad907147e SHA-256: a121c84ae119c7e439a5e78149e3d8aa48ba5edb511dc67afa3195921fc2d1c1
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 0.9996

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://crophysi.ru/wix?keyword=things+fall+apart+study+questions+chapters+14-19 PDF link annotation
    • http://fimewot.xyz/vumojd7i00.pdfIn PDF document text
    • http://sdek-24.cc/julowebusozorarirenfuxn1.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/bank_loan_application_letter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fe9206bde112.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/gatiporijexox.pdfIn PDF document text
    • http://kepukarob.sportsontheweb.net/pokemon_sun_and_moon_cosmic_eclipse_card_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/pwKicjt/48807846128.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/96444336159.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/ghWSuge/business_day_calendar_2020_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_602ac15792489.pdfIn PDF document text
    • http://13millions-warzone.store/35267674829zr8iv.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/9c5e9297-a77d-4d83-9faf-fa815a0902ba/jenn_air_oven_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131a33cc-b401-45d9-bb41-c0b4ff2bf8b7/iso_9001_version_2015_clause_7.3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912499dd-7011-466b-afa2-797ff5fd645a/peluledu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4521deff-e81a-4706-a521-2ae06c489265/how_to_install_sketchup_2020_for_mac_catalina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27775f96-00d6-485a-b1a7-2ce88ea7f669/jetutafomemogifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6cd0470-8eb5-45e5-af12-4d897717e9bb/61949983106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041ce0c2-37f2-4497-b5f5-1ff450aec09e/nakilofoxaladowudaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd886c4-9f2e-4625-b37e-560dff6e714f/sumip.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/fundamentals_of_financial_accounting_oxford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d517701-c62a-4e3b-9312-e1f92630b581/here_i_am_lord_song_download.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 7

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_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 5924 bytes
SHA-256: ef4733b23bcfd54ebe71964e6c64083f22f3e9352a4a7090a87ebb75bb972429
font_01_sfnt_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 10632 bytes
SHA-256: bce16a9bd7076c88a248d14c112a0e577cddc13ddcfc1f7939feecb0e35f0532

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