Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd7b93d9d0ba536…

MALICIOUS

PDF

77.6 KB Created: 2021-03-21 09:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fa65be1bed7349764d827c75c37fb8fe SHA-1: bfe229bef5ab074a723e73fb40f965509516953a SHA-256: dfd7b93d9d0ba5365558da6ee741de661fd21533ef1bcc2eadff80d2a9aec87c
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs pointing to disposable hosting domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to malicious sites.

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://lozipotod.ru/wix?keyword=permutations+practice+worksheet PDF link annotation
    • http://reduslim-shop.site/sql_server_management_studio_developer_edition11lh9.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/68188890753.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/83651507322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_6046466bcc62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_604d90fa7e14d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5fe181ca4b3ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fc6af8e21fea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fc63962b3252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_600ea3d790961.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/how_much_does_an_oil_change_cost_for_a_bmw_5_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_604944a2e10e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_60403226895a1.pdfIn PDF document text
    • http://zoomita.fun/76894047226xdeer.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/measuring_and_monitoring_biological_diversity.pdfIn PDF document text
    • http://tewosube.mypressonline.com/algebraic_identities_for_class_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_601114609c3e2.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/petuzutemixuvod/best_cooling_sheets_for_night_sweats.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/ethnic_vocal_sample_pack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/redoronawim.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/97225559297.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_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 5180 bytes
SHA-256: bd9f62124e2d1cd5147d53da606d42d7093abc65aeb789cfe615ef7c3c12a47d
font_01_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 10652 bytes
SHA-256: 3d49c083374fa22c5fee578bacf0fa9804ba3c0e16b2626bef9b6bd36bd71f70
font_02_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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