Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad4011630ce0270…

MALICIOUS

PDF

77.0 KB Created: 2021-02-09 12:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3c83000daab7ca64e572db3833cc768b SHA-1: 2962a82979c35d7155f10e244dccf388d0318c35 SHA-256: cad4011630ce02700e8dd6a32e4226fe49cd59997117bad039e87378a657388c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external PDF files hosted on disposable domains, suggesting a link farm or phishing distribution mechanism. Crucially, a heuristic identified a 'Clipboard command execution lure,' indicating the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands or downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://leonvi.ru/wb?keyword=windows%208%20bootable%20usb%20tool%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5fd116c07009c.pdfIn PDF document text
    • http://wordwild-store.com/federica_moccia_carmagnola_mapkt0gu.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/iifXBCJ/lupanoliwuxozaxofuwawit.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/YjdIWKQ/transmission_jack_for_sale_craigslist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5fdef412bbeae.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/electron_configuration_bromine_long_form.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/IVCyChd/88210417554.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/gghjdTa/clash_of_clans_coins_and_gems_unlimited_generator.pdfIn PDF document text
    • http://netubekebusis.iblogger.org/35604479016.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/343gdPq/amtrak_routes_through_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/iiKhcid/friv_fireboy_and_watergirl_3.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/jiifjdW/xexawavasubalojifamopaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rawarawoxegig.epizy.com/aashiqui_2_movie_song_female_version.pdfIn PDF document text
    • http://dufogatate.epizy.com/labol.pdfIn PDF document text
    • http://xeziribosivamis.epizy.com/solved_aptitude_questions_and_answers_for_accenture.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 5224 bytes
SHA-256: 24de3172777ee4c927c2947e227e1d57a1a247f8f50ecc7d4797655d0da4548a
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 10596 bytes
SHA-256: 9e75b086330991b24457ea57332a114ed6e0af0372a304427e1118fc4ed858d4
font_02_sfnt_off000118d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.