Malicious PDF — malware analysis report

Static analysis result for SHA-256 75909da5dae081ab…

MALICIOUS

PDF

79.9 KB Created: 2021-05-19 08:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b523a0c88e8e83c657e77e62235b87dc SHA-1: 2d1094479882a1ae8fa30b35cdd427241c917e49 SHA-256: 75909da5dae081abcfce74629637727cd19e179ef7446cf1495a7af349ea579d
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=always+kabhi+kabhi+movie+download+khatrimaza PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379035/normal_605bc1fe220db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5fdf4979c63bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_600ca92d45e6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419198/normal_5fefa400836cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_606ea729ea046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_6039f91e5da5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5fe5e1486c613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_604a3cbf6b982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_600a502a93ba9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471985/normal_6006f90386c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_6026589f7eca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_606e6aead1577.pdfIn PDF document text
    • http://maxomafegafo.22web.org/kivirode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_6021c474570f9.pdfIn PDF document text
    • http://fukoxonezadanom.22web.org/3716338389.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wurasegato.rf.gd/business_intelligence_analytics_and_data_science_4th_edition_free.pdfIn PDF document text
    • http://kesazubajumat.rf.gd/53085815960.pdfIn PDF document text
    • http://rowagaparik.rf.gd/flight_check_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1f5237-6ac1-41f9-b3e2-86999d0208c8/how_tall_is_hugo_weaving.pdfIn PDF document text
    • http://mobosefevexaxep.rf.gd/rowokevinabulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/158eed86-bcc9-4747-a9f7-efd7e08355b2/best_video_games_2020_xbox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a82369-e4ad-406b-9ea2-1d53557c5645/blackmagic_atem_switcher_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0bb45b6-b453-4281-8cef-d2c0dc5a53e7/16893725647.pdfIn PDF document text
    • http://xubulaxojetuka.rf.gd/change_battery_cateye_strada.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_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 5560 bytes
SHA-256: 6ea3381fdc73e38081ca6447856858ac26f41117f6979a59e9887326fd61ce14
font_01_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 10816 bytes
SHA-256: 9b57553a20f561d41e280cd3038c28a380971b51a6d192dd6c05b64f0c69e4b7