Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30ab03f28c9a4c4…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 13:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf5d8bd6d287a9f7192453c54686e1a2 SHA-1: 59e2b8718f90f286708e208b2faea8c0dfc1c50b SHA-256: f30ab03f28c9a4c4e0b3a3192d15c437bd94be07833b86f176bd92325a6b3a83
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/123?utm_term=b+tech+information+technology+scope PDF link annotation
    • http://nibajafij.medianewsonline.com/how_to_connect_my_swann_dvr_to_wifi.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/32584382580.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/67414802491.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/57009913166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0b58f6-df00-4623-896e-45f59853a2f4/journal_entries_ledger_trial_balance_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c639c7a-fc22-41c1-bc13-18490c4f9151/63525585295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff18664b-9e1a-489a-97cf-72d8911bcd50/what_kind_of_battery_does_roomba_use.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_0c1eb4c7647946b5bfd5b1cd1d7f01ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxunaf/film_bioskop_21_terbaru_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7263f2-3e88-42f7-b041-a43fcd596333/27673019091.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_89cbc9f824c4425498ea1783314a6a9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7bcb0d-7ebf-46d4-99d7-b90ddc2d893a/brother_ce-4000_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/camila_cabello_matthew_hussey_age_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/33367931341.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/el_seor_de_las_moscas_pelicula_reparto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e105c1e-322f-42ad-b858-116d114b6368/hallelujah_chorus_violin_1_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/xofaduxonenuvokobiguwaf.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/cada_um_mora_onde_pode_atividades.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 3

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_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 5580 bytes
SHA-256: 1d5abeeadcb3c4c26ac331d55d08e1c9f21faf2b5c34483f365a97863b852c26
font_01_sfnt_off00011138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11138 10912 bytes
SHA-256: 4ded185408e72a1c49b57fe1051535b0359838949f9da0c5731334ba6285eb49

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