Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93d5b124505e9ee…

MALICIOUS

PDF

69.5 KB Created: 2021-03-10 06:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 54b2126fb409dfea22153aff8dd2b838 SHA-1: b0014a514d24d79c53c1a4b3357bb24f68b98428 SHA-256: c93d5b124505e9ee4d690e2fe7b09e35b1bc08c889e69b208dd7a679d00be21f
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically targeting a search for 'basic life support manual pdf free'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further compromise.

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://seumenha.ru/award?keyword=basic+life+support+manual+pdf+free PDF link annotation
    • http://tertov.xyz/jimetilq73yf.pdfIn PDF document text
    • http://bandalet.club/statistics_books_for_data_scienceg2zoq.pdfIn PDF document text
    • http://skout.tech/farewell_to_manzanar_sparknotes_chapter_200bc1d.pdfIn PDF document text
    • http://zvezdasevera.online/31419902913q6893.pdfIn PDF document text
    • http://sweetygirl.club/hamilton_beach_durathon_iron_reviewseusdz.pdfIn PDF document text
    • http://easybranding.org/2006_dodge_ram_1500_tachometer_repairwwvs2.pdfIn PDF document text
    • http://sfr-espace.best/assamese_song_zubeen_garg_2019ui1q7.pdfIn PDF document text
    • http://luminar4-download.xyz/spend_approval_matrixvyvyg.pdfIn PDF document text
    • http://hisgohar.site/cambridge_audio_cxn_v2_owner_s_manualc4u97.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/58420561205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_c0b12c27d21148b19613e99a7f15924c.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_b4a2d5ab932c4dbca4b35908cfa28545.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b284ff-51c9-456c-a935-283716428571/historia_universal_de_la_tortura.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/how_to_connect_atem_mini_to_atem_software_control.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_bda8bc7133f8455c9e55b92177e1d0ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e36612-ae1e-4234-857d-4df08bd01691/88521509233.pdfIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_182775b3d4184958b18942083d51feab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/premiere_pro_transition_presets_free_download_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecb5f93-00a8-41dd-b1b2-51ad23890f65/legend_marker_size_excel.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_246b322537124639b526c1e2ddb83ec6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemupajese/bsqueda_de_informacin_cientfica_en_la_web.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_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 5348 bytes
SHA-256: 27538b79945a90c346b4a66a3334dd3f92c2339384f1aa10f8599490921998d1
font_01_sfnt_off0000e488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 10780 bytes
SHA-256: af9e6795334047f752cb0d5ce444c156542677ee352c0f768e1c5d37a4548b48

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