Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9911304f43f479…

MALICIOUS

PDF

86.0 KB Created: 2021-06-13 02:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eb1ef0c0023970ab69d8b366412718ea SHA-1: e933b5aadda2abcc5a42121fe04a0298a269713b SHA-256: ad9911304f43f479116967367c13ffab07f3f34d9b5690ae65af26cf6de1415b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wastran.ru/pbw?utm_term=pokemon+alpha+sapphire+rom+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496585/normal_5febb1fea03bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_601544192a97e.pdfIn PDF document text
    • https://kefenatab.weebly.com/uploads/1/3/4/8/134854159/bituwepe-lasikuxewe.pdfIn PDF document text
    • https://kupepepa.weebly.com/uploads/1/3/0/8/130874668/9075f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_602a15e539168.pdfIn PDF document text
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/6038bb83326add6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_604012e28478f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425924/normal_5ff90b93ce5a8.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/pizig-mudumepakebota-fapir-nalodufufiporo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453579/normal_6040f293db5e8.pdfIn PDF document text
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/kowuvixutareb-mixiruvefev-lojitejagu-fikixewone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_602458724686a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifatarege.pbworks.com/f/planisferio_con_nombres_y_division_politica_para_colorear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7446b3-8279-47bf-b39e-38d5cfadbbf4/61739102108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18772fd-054c-4702-86cc-e1844846a58c/orbit_sprinkler_valve_home_depot.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144552882/how_to_reset_victsing_bluetooth_fm_transmitter.pdfIn PDF document text
    • http://pewexojazo.pbworks.com/f/bupasafizororu.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144564333/cie_igcse_economics_revision_notes.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144653157/63523209597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82ae11c-2276-4dea-a1e4-884e20eb13a3/53038359794.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/tutexaninomek.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144424443/jaxututuwepanu.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/15135011296.pdfIn PDF document text
    • http://serizedez.pbworks.com/f/47029788918.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144659748/turinogisupased.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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 8904 bytes
SHA-256: 6821a918ea78021651ddee663ccb5d90889ec8601a31363a85d1b21f800704cb
font_01_sfnt_off000110d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D0 5264 bytes
SHA-256: d06d59485a4afbfc13ee23b701e059939e2e2bd27afe266a7d87227b93f7c390
font_02_sfnt_off00012289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12289 11100 bytes
SHA-256: ea3814f09cbf6db0e80acc297e0d3f14662501797a71f6dc43682e6ea78f08a2