Malicious PDF — malware analysis report

Static analysis result for SHA-256 47299eca6bdad893…

MALICIOUS

PDF

91.5 KB Created: 2021-08-06 09:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4c8e64de76499ab196e2943dc8538ba SHA-1: baee5d372d3ff999582c0c9049497f6d78cffac1 SHA-256: 47299eca6bdad893ead19963c9b79e84229555f1c8fd986fe4b423f5b3111c38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate an attempt to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://drafthe.ru/uplcv?utm_term=how+to+pair+earbuds PDF link annotation
    • https://sca-kc.net/scauserfiles/files/61174379188.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/gugomizomabotomop.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/8ff957c15e3dbebc1c33f07128dc33f0/funukadavo.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/49859044115.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609448c967cd7---bodegedexerifirikurogud.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/basulakumizizafonu.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/56191718157.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/77261092586.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/49kql6mrjbd46eupkoloko3kfm/rirowegewexapoderosimu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1dd9bbacd---14868517503.pdfIn PDF document text
    • http://maxbrio.kr/files/files/7074925881.pdfIn PDF document text
    • http://446888.top/userfiles/file/55810807544.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/jejasiboruzukafilekon.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bfeb04861---22185433700.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/kajabutagezakeri.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051003314873499.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a497485ddc---69864020210.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/8ea1272211c33a9134c292298f94ec7f/jizolam.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/59816309062.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/mobaved.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b9e49b337---88743647679.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/92499087729.pdfIn PDF document text
    • http://namngonviet.com/user-/files/rotubuworisuzowaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 10552 bytes
SHA-256: 550a6c8327fdcbb34960d932cbb65f56ed6c8fca601cf572e321d9455c1d4bd4
font_01_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 1676 bytes
SHA-256: 1004cf7649f4e1c0a16772cc103ee4eb48438789ac0d187f2654c6a339020f54
font_02_sfnt_off00011b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B53 16740 bytes
SHA-256: 3d1f7a5c368a12fd0ac3950cd9812317803fdaa730031d3573413ccfc69cd82d
font_03_sfnt_off00014718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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