Malicious PDF — malware analysis report

Static analysis result for SHA-256 216259c933225293…

MALICIOUS

PDF

75.5 KB Created: 2021-05-30 09:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9fa6545ebed4e801112db9b203452b62 SHA-1: bba2df8221817edfb85db33644f54e34d42d1afa SHA-256: 216259c933225293a585fff6e93ee0f7e2146bcf15d1d7e642b9bb8350d254cd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content.

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 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.
  • 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://botokaw.ru/123?utm_term=dedication+ceremony+program+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404299/normal_6057c12d8f35f.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/lurovowim_sofurowo_wizito.pdfIn PDF document text
    • https://paxuxavige.weebly.com/uploads/1/3/4/3/134373921/xugaxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ff6a2e2e400e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_600a782f2fc2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449419/normal_60010eefbec74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_606805bb3013a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fcda96c5eb93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_6012396ea96ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473322/normal_60076b3527d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_600ae445dddbb.pdfIn PDF document text
    • https://venujavuzuzejo.weebly.com/uploads/1/3/0/8/130874514/8180319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478422/normal_6057020824f05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31af3dbc-28ec-4939-8c69-7be35e2e3847/realtek_audio_drivers_download_for_pc_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9821c13-9393-4402-bb8e-4eaf62c85985/panasonic_bread_maker_parts_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5789ec8a-7455-4e2c-a980-6184f31ee8b7/convertidor_de_gramos_a_mg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c330f640-9ad8-4e48-a5c6-5fb8ea398d8c/how_to_connect_your_directv_receiver_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5f4109-5edb-4e09-a1b1-da2f055e5a88/gufutunutedabegazukoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403c8d18-6bcc-46d8-ba40-11fea102e7e6/8399736398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5ec722-725a-43b9-911c-df3f6ae21361/49906984151.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5316 bytes
SHA-256: 1f4ced931a0e1b844da15b494a82ea4f82cc6b40dde3e86b831a5af07c0675b2
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 11484 bytes
SHA-256: 86b92232aea2728b151e469a0e566660769da2969838bc3a3a1c48c3ec0f0ab7

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