Malicious PDF — malware analysis report

Static analysis result for SHA-256 7febbf9027f81194…

MALICIOUS

PDF

76.4 KB Created: 2021-04-06 11:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0c06a1aa91c36aaea9712ee7074b22d8 SHA-1: 003f6e71ddcd9d888c3fb43d1209ee44e1f57f14 SHA-256: 7febbf9027f81194bc6e86ff375337aaff25a2aae11f46c0b6d70189aa3ef4e8
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to downloads and applications, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/award?keyword=lipid+profile+test+pdf+download PDF link annotation
    • http://vukufisoxe.iblogger.org/bernard_arnault_biography.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/23658988736nstcp.pdfIn PDF document text
    • http://tuimag.ru/mac_screen_recorder_with_audio_apptq31y.pdfIn PDF document text
    • http://yblda.fun/9888225857vb0aw.pdfIn PDF document text
    • http://psyhologrzn.ru/sexusakegukokatafa4ck5.pdfIn PDF document text
    • http://sexesex.site/624359781507u5nv.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
    • https://s3.amazonaws.com/mejifavo/zesufitukorajilura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c57b5f8-2215-44a1-be55-74a7272f5865/nitepidojusesefe.pdfIn PDF document text
    • http://povugilovup.epizy.com/personajes_principales_de_cien_aos_de_soledad_con_sus_caracteristicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f562e6ec-1521-479b-92e6-a85cb0438131/ikea_ivar_shelf_assembly_instructions.pdfIn PDF document text
    • http://pamakejexo.epizy.com/fivulojirejopekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9f2a76-240a-4d81-b7e2-d5784b263a44/vorifobabolorogak.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/aladdin_game_for_ios.pdfIn PDF document text
    • http://mimuzef.rf.gd/10420535183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c506d8-a155-4339-be0b-1c627502f764/nazotonorafiviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74da64e-1e3a-4e6c-823e-adf453313fef/jojiwajofagas.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/online_marksheet_mp_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2215b614-ed89-4777-96ca-e5a34326567d/zefagajitolozuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a6aef9-6c0e-409a-80f7-987da798f264/stihl_extension_hedge_trimmer_for_sale.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_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 4856 bytes
SHA-256: 266890df9c4456aa4b16df79e9737e6213d870c15dffecebc8ba3b9f532f1513
font_01_sfnt_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 10816 bytes
SHA-256: 1a05f572419be7d0696c17a339869eb300e68ac4716ae73c917a81f65bec34a2
font_02_sfnt_off000115f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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