Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbecf749ae50dba2…

MALICIOUS

PDF

89.1 KB Created: 2021-08-17 15:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 727d6484966707ecd548956218a69fa7 SHA-1: bcd7b5a9df325f208a2f7703d96373d1baf97f7d SHA-256: bbecf749ae50dba2194ae09a486c5e5c166dd5dd2c55ab3dfcb428298e303286
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress sites and other domains, likely serving as a distribution point for malware or phishing content. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites, potentially exploiting them via drive-by downloads or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ketchas.ru/uplcv?utm_term=gunship+battle+mod+apk+and+obb+file PDF link annotation
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a0cd71dd00f53433d6a1aee7aacd1578/nosuxew.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/94f69159880d70e9429612ec35f70219/76639171439.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/t6obpmvt0gnkkhpv2pku5md3p6/37476456007.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/tegimejokuxexugitidex.pdfIn PDF document text
    • http://yuha.be/_files/file/pudude.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/58231542652.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/xugonatalamokekaxe.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e3b99b18be---vixiwowokomojibi.pdfIn PDF document text
    • http://charivne.info/images/file/pevirumakalodavuluwor.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/19243172700.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/pinuzovigit.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6f4265351e79db679c8fc2e8e8fcf4dc/32770447952.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/cru54ehiml0dk88ia2n7pr8gao/lanumegexofekipe.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/29932967649.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/ba47c093c937032d1e634d9bb5a48dd3/3567725159.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bd978aa6d63---vumozeres.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf89ab1a42---xijonevamufexuz.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/xitixuwenalaweki.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ni978cgro2040mtn67suund4ht/wedomirovaruzoxitag.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4079b0c29285aef1c581102ebad71d6c/11943630860.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0102d76cfa---satowisede.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076c6017a3d5---49574769626.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16108a5935aecc---15069609573.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/gopitexoteneselusizinutat.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_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 16884 bytes
SHA-256: e07d3964c3bd6bd0c420e5c8da18e1c0ffc6c82cb401adcc3f0a8041cfef7ff5
font_01_sfnt_off00010e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E69 11032 bytes
SHA-256: 28440174bf8e29f299a7c38eda0158d2e7be1c5fcdaf36ec255ad74aa6c4ca5c
font_02_sfnt_off000127a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A9 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off00013cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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