Malicious PDF — malware analysis report

Static analysis result for SHA-256 8217fafa871888c8…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 21:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ffcefc2c9e9397184dc335029ff2e0ec SHA-1: f4053e5300f26445bcf50b089bdeac89362de562 SHA-256: 8217fafa871888c8913a8d45dac02ff34123df0609a215d71a5fb9c6dc5d51f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=aralon+sword+and+shadow+apk+data PDF link annotation
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e382890eb5d30db460d376d2ac7247fc/89598856396.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/rimafolofu.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/85685631691.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614663fa061b3---nijozoxof.pdfIn PDF document text
    • https://polytex.de/sites/default/files/zirabetoliwog.pdfIn PDF document text
    • http://th-hl.com///upload/files/doduresovevimo.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7b23ab495---75088700866.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/6081880344.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/68151421611.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b19ee9155---21902691538.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/10565064693.pdfIn PDF document text
    • http://domuran.pl/files/file/91724936038.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/mijuvokulipemevojigaxelo.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/93713842465.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/lisawonise.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/75108899560.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c838466f29---sifanuwux.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/46439871645.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/42108348345.pdfIn PDF document text
    • http://inspeq.eu/public/files/26150176445.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/b658ba0efd3251993bbba93a68893b95/giludetonuwoboxetezeveti.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/donomexejufov.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/13438841193.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/jidosupa.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/bedomeg.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02E 10424 bytes
SHA-256: ad2b6d0f15658da2237ea024085af3f8ec85661949c11297f5ee2b517e0b15d0
font_01_sfnt_off0000e7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CD 19508 bytes
SHA-256: 0630b64eaf5c34d95c5bc6b9e9127042a60f75847b160661cd4fc147cc31394b
font_02_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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