Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e267339befa157…

MALICIOUS

PDF

72.3 KB Created: 2021-06-09 17:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4b28f9cab9aaa3bc676060d5012e3a43 SHA-1: 331e94d54cdc4513dbcb50f56a469f174e814d2e SHA-256: e7e267339befa157be8d131a6aa12d4b793f696bc28999ae075cd49929bbc681
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these external URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://synerhu.ru/pbw?utm_term=let+it+go+note PDF link annotation
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/suvomuwidobetip.pdfIn PDF document text
    • https://jubagimijan.weebly.com/uploads/1/3/5/3/135333733/9488789.pdfIn PDF document text
    • https://vabikepopuf.weebly.com/uploads/1/3/2/3/132303012/tilupav_komaxofobuzise_tipibama.pdfIn PDF document text
    • https://lumamiwaba.weebly.com/uploads/1/3/4/7/134735329/baporudapomojokuze.pdfIn PDF document text
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/mobabitewaz.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/74133dc4-2fd0-418a-8508-afa8f27406fe/pepinopevexekudoxip.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144730071/haynes_manual_ford_fiesta_mk6.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/seminar_report_on_autoclaved_aerated_concrete_blocks.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144422226/spoofer_pokemon_go_android_apk.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144452778/d_name_love_whatsapp_status_video_download_sharechat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03fe64b-7057-4c2d-a91a-bddbe53e4d14/will_bose_replace_ear_pads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc3a59c-6d2f-4f65-bcb5-f55a33b287af/41753271644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f24be9a-d1ab-4037-840c-1e0a54dbfe85/goal_sheets_for_employees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f530790-a36c-4935-8a99-5927205754e7/how_to_install_glacier_bay_bathroom_sink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489cfa4f-a1d8-4559-8cc4-d144f2344527/niwevevupozazevimak.pdfIn PDF document text
    • http://patimedudemu.pbworks.com/w/file/fetch/144546849/ethiopian_constitution_afaan_oromoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120e9576-dab9-47b0-a04f-018e4ad0ce1b/62091434989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a696771-49ff-47f2-95d1-64d4aa7a62c5/mavibiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0d1af6-b34b-40ca-861f-86ea2c266326/16140871948.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_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 4276 bytes
SHA-256: 58561775c171648cd7566a9de98042145857dd7a772daafdebd9240aebb33393
font_01_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 10660 bytes
SHA-256: e6951dd69f4a808c2c684facb2ab8100a3149f68404ddc81116de5a7e58c267d