Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aeeb9a8123e94ed…

MALICIOUS

PDF

75.1 KB Created: 2021-03-24 08:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46a126cda50a779991166e3b839be72e SHA-1: 12dc004a76b4a14548fc017d9554aa0e60c44abb SHA-256: 5aeeb9a8123e94ed2aeccfe04262af0aa2365fffe83d13a28e4bfae1f5ef8d5b
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the document's structure point towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/wix?keyword=hack+for+agario+mobile
    • http://penaleduduzib.iblogger.org/98230528562.pdf
    • http://milesnires.xyz/what_is_considered_job_abandonmenti82a9.pdf
    • https://cdn.sqhk.co/ziratede/PfQTheb/tosarefibosawix.pdf
    • https://cdn.sqhk.co/xopuxuvop/hvXHEXS/oxygen_saturation_normal_range_elderly.pdf
    • http://pushbiz.fun/vebapevig875h1.pdf
    • http://dusamoka.mywebcommunity.org/one_way_anova_table.pdf
    • http://xemopubuga.iblogger.org/xemisinibixurepet.pdf
    • http://my-favshoph.online/tipos_de_grupos_humanos_y_sus_caracteristicas8su38.pdf
    • http://kutegexuwudaro.getenjoyment.net/26126203027.pdf
    • http://omoikiri.info/soundarya_lahari_lyrics_in_tamil_free_downloadd8y1p.pdf
    • https://cdn.sqhk.co/kinibemazoz/NhifvLg/65526406042.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://towirasoruxapob.rf.gd/96781727965.pdf
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_bdfe331935e74d7f81b742cd59e90104.pdf?index=true
    • https://s3.amazonaws.com/xukanomarexumu/spotify_app_android_free.pdf
    • https://s3.amazonaws.com/wujixus/what_is_freedom_for_you_essay.pdf
    • http://maboruj.rf.gd/42472060281.pdf
    • https://s3.amazonaws.com/wovisak/properties_of_ionic_and_molecular_compounds_worksheet.pdf
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_386c3cb8b6784da296413834fe758dee.pdf?index=true
    • http://damagofozoronu.epizy.com/bass_guitar_method_free.pdf
    • https://s3.amazonaws.com/gavobawum/risk_pc_game_1997.pdf
    • https://s3.amazonaws.com/pokorevalaxex/how_to_replace_electric_stove_drip_pans.pdf
    • http://vumamuv.myartsonline.com/59856538679.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbea.bin
cdd4e4077d590e3a935048e51c373544f160ed1ac1f7fbbd99dd25e424d3648a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 4788 bytes
font_01_sfnt_off0000ec29.bin
dd5192c413a1156b3d4e6a7bd32c7e56a133ad06014bcced8e0f4742ed056dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 10712 bytes
font_02_sfnt_off000110fa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 4324 bytes

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