Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f0051d1ddbf984…

MALICIOUS

PDF

196.5 KB Created: 2021-07-15 10:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 253d8e8e803dc1848d564b181f91f04c SHA-1: 29427a12e56d5302da315f1d5e214a2e06b28de1 SHA-256: 15f0051d1ddbf984f3f18e2cdff1c66595df661cd51fb0e024ec6f466e6509c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites, likely intended to host malicious payloads or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the structure suggests it's designed to redirect users to these compromised URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 5

  • 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.
  • 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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/i7a72le2uf47ovg3vb1qdc9ri0/89529787171.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609008c7a2b10---jisupurefubekoxafexipago.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6dc452e2b4df18609223ca5da79d3883/jikanuw.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e9fb4eb06f9429057f5eb6938903371b/21216146365.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/64211121869.pdf
    • https://ajansnigde.com/resimler/files/pewuvalupomiwezu.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab04a35825c---89722566288.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/5d7a1b904446469e7a9ac4925717faee/34681672578.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079cd13d882d---53407540997.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adecf916370---15663413818.pdf
    • http://qtjdb.com/UploadFile/2021/06/06/file/20210606_183331_175.pdf
    • https://mamo-tato.ro/userfiles/file/81392492708.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099d50e47924---dulunasofalusipini.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/b5bd261372360e85ffce0697c840a79a/61682264678.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fcaaaa5be58f0e92e4209b824ee46ef3/75119679796.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8edbc383ed0c7145cff3c9eb44d297df/wotivaxawibopuduluxerik.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/52005cd29ca1abfe66278594389e00f8/62962358548.pdf
    • http://palami.by/images/file/48620240895.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/71260vosasdijrjj7pueol0sol/mufavifopugutode.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/faa1c44f8c51016c6cbd919e6e7b7207/69834175369.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce48ef565---78706132368.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pakistan+partition+of+india+book+pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/97a8d26bbade8105afdc59aa976b801d/77524806956.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a377.bin
56e8af59dd455d8070c4c2e18168b6af2df6ac1f69e03a7611b289c2047a5efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A377 19072 bytes
font_01_sfnt_off0002d47d.bin
a0feefa6220d45f0cec2ceaabaa9e8053e173ce2d45ebca4d7151124609f2c34
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D47D 10544 bytes
font_02_sfnt_off0002ec65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC65 16792 bytes