Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d582536e6d04a4a…

MALICIOUS

PDF

80.9 KB Created: 2021-08-06 03:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b76c920c79c6a7185a54cb9dd5f82223 SHA-1: ce92b33ab3fe0fb091af4d69715961256e0718c5 SHA-256: 8d582536e6d04a4a5504ce5212f3c04b447c53c5ae6edc1335d70b3e8cb86220
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple links pointing to disposable hosting, indicative of a phishing or malware distribution scheme. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into decrypting a payload, likely a Trojan as detected by ClamAV. The presence of embedded JavaScript, though not directly executed in this static analysis, points to potential client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://meble-tk.pl/userfiles/file/26956696693.pdf In PDF document text
    • https://pathakpharma.in/singhania/downloads/file/fubotoxetudemagizebevemom.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/vulexivolu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/majawemijavuritaxizo.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7009e2f404---vixuporasoxukavunutixazo.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/94051305624770f8035d50f546d5ab2d/95601011097.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/65383876609.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d6625aa46753340a2f99f1bf0dfcab08/nukezema.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a6e991b6---49333071970.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac5584b86---tofuvasuladulabimilak.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5cb9e877---tosivafogisivefemijurutu.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/1b61cbe696ea05703f0bbc052750e7d7/jugaxafasubevesobavafak.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad035ccc85b---333988979.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089912ca9b66---nutimefuludunolekuwuke.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/105569751260fba124b2685.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f26e3cbbb---65375685048.pdfIn PDF document text
    • http://balone.net/_upload/file///noguliwopagorulifev.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/mavefixaramaxaneni.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/meparaw.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/36527009147.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703f477c901---19359670409.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/64524984252.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608fba4155f64---lonekoseme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=convertir+pdf+escaneado+a+word+editable+gratis+onlinePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/41da7fc89ce787757ad907ac2d4bea67/vakifogixexejipamu.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce3d671d0e---renamojubibemabiw.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_off0000d3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 17948 bytes
SHA-256: 07fcb9b35800c14c32c436b470c030f73d4bd926991d4b2f2b3df66f69c88505
font_01_sfnt_off000101af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C6 11120 bytes
SHA-256: 4ea01204800f68905f84ba235493927d7ad378c56dbfe08cf0d5bf53b4aec2d1

Open this report in the interactive analyzer, or submit your own file for analysis.