Malicious PDF — malware analysis report

Static analysis result for SHA-256 648b22984f630e71…

MALICIOUS

PDF

91.9 KB Created: 2021-07-24 20:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 039f55365a8eefcde15c048cc630f0d7 SHA-1: ef355692247fc5be2795c24f10a240e4ebaf993d SHA-256: 648b22984f630e715f94765bfef5b13208ae03d5de3710600ffd88fd4f78f6f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple disposable domains, masquerading as a download for a 'wii u emulator pc download 32 bit'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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 http://aliglobshop.com/userfiles/file/xopapo.pdf In PDF document text
    • https://travelsafeway.com/userfiles/file/11360416574.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/pepuxejimiwoserojoto.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/c7f98ff120cae0e122038c00ba09ad5a/varodoxavadive.pdfIn PDF document text
    • https://anfauglir.com/images/file/rinazarisefeminoliposa.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9d7401fb1ca34f3d3f4f09dee7748744/wetotatofugofi.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/1a17a92f872cb68518b05ca14f7d4e21/duxeruj.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/79282255746.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609324d983d86---kidaji.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/78ef594dbe12166b36a14c4c62a271ca/vinogusedu.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/040646415711.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/5da324db54201b64729848bcc96600e7/43309683305.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/1683610302.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/tikobikisu.pdfIn PDF document text
    • http://anadarkogomezfamily.com/clients/7/76/76920377ef4e0cfe2c6e77079a05cbd4/File/nukubewinegugerupit.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/20127256367.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/77603553673.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/57169426928.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7853e20cf2---xezatelovexibidike.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/s0a97vfr3eouit6ir8fa0mmr65/73329906462.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/puxufixosez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=wii+u+emulator+pc+download+32+bitPDF link annotation
    • 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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 17404 bytes
SHA-256: 6a3f9b94cf9f09d636cde5fafb1e124b910d9b8d717fa0a8537886a7dbc69276
font_01_sfnt_off0001196d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 11120 bytes
SHA-256: 98870ad23cda65d566964a851c00530c43f5f9bd509a2e41bd45551f9e1a1cf7
font_02_sfnt_off00013339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13339 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990
font_03_sfnt_off00014923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14923 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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