Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32e2f8738dfb93c…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 09:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ab811d6ca62530b2742a7016d27d6df4 SHA-1: 5c48081e7857d0bf3cf034c090daf0070ca99f22 SHA-256: c32e2f8738dfb93c091b8e2923bf706384c55392fb95fbff2665305ed657394d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/strik?utm_term=dark+souls+1+character+customization PDF link annotation
    • http://likedizar.medianewsonline.com/panuwalafiderevudutodum.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/ibhhAic/18251373176.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/el_budismo_historia.pdfIn PDF document text
    • http://woronari.getenjoyment.net/fundamentals_of_aerodynamics_book.pdfIn PDF document text
    • http://zefanawibades.iblogger.org/xopoletomawofit.pdfIn PDF document text
    • http://palejep.22web.org/49776731179.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/bsc_maths_differential_calculus.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/dhaaFhf/motorcycle_shop_near_me_honda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dirosulazab.rf.gd/administracion_hotelera_division_cuartos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee12e1b8-bd96-4a7b-9127-e3be626c42e3/lowiraroxipak.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_04c6941930ac4531b939c07393fb1a4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0fe9145-3018-4599-b4b5-f630b37d2f9e/relationships_between_electricity_and_magnetism.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/necchi_supernova_julia_534_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae48053-166a-48ff-9e4d-d817d7308c91/38628862111.pdfIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_662c179652ba471aa2f22b617606123d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f26d6c-beed-4e1f-8247-0263a2334806/5876843979.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_b0168c87c33846d59921f233813f6799.pdf?index=trueIn PDF document text
    • http://kipafiperugava.epizy.com/37458676729.pdfIn PDF document text
    • http://fuxufotab.epizy.com/gakugesizujatisetewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/388cdf9a-dc2f-4250-9cfc-bf599e931e4a/how_to_factory_reset_an_ipod_shuffle_2nd_generation.pdfIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_d0b391d4d5eb407695cb321d76131dc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/nobag.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/jaxeniju.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_off0000e7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 5204 bytes
SHA-256: 252b5c9ac06707b18e434a5083d7e0e3a16b8f88e3b83df6525b0d00da15908d
font_01_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 11140 bytes
SHA-256: f1d71df9da2432dec2d92fc56eb6f28fbfcca06763a4468eee2a77942efbaca5

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