Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec64dc367fd422a…

MALICIOUS

PDF

91.4 KB Created: 2021-07-30 03:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b92217bcd95424460b6b309f850b354e SHA-1: b3e082fc53e832daaa11335044842d4e62c3eecb SHA-256: 6ec64dc367fd422ac34a3105c433cbaf5a45f3f9975f83185dc5737aabb36f0c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/nisr4cs0kajl18rqgek2pviar2/42224804698.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/790d04276df97f0c688c909a6f4d174e/zejima.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/puravapanota.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f51fb80f6---29668960190.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2e9af023---relovupaboma.pdf
    • http://zzweien.com/d/files/fofibexuvapituzanumijapad.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb10d054ca---69348655623.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf0859b543---31804407576.pdf
    • https://olivier-daulte.com/ckfinder/userfiles/files/jugivuxumanijiduda.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/acf062e65da1e438c0e6eb73f11d15b2/dazuliwav.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/f575c148a42dd208044e22be3a033214/62701180461.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/c9df14f17a77bfad313e90c54cf21d31/38156277964.pdf
    • http://travelshops.pl/userfiles/file/1324538131.pdf
    • http://happyhanool.com/ckupload/files/4666853096.pdf
    • http://malabarisproducoes.com/arquivos/files/4246504700.pdf
    • http://kbo.pl/ckfinder/userfiles/files/biwesoran.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4f6ff2b564f757724f56d4ea7bcc6645/jedurileboj.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/sadibo.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef51e8c2ba---61089836295.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefe421483---53125166941.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe6644fa9---19940580243.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608629fb65c4b---sebuvitakadebeni.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160833b92c5f60---xuzaxodinorada.pdf
    • https://aronabritcan.com/userfiles/file/41315207309.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=rae+sremmurd+swang+mp3+download+fakaza
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc39.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 16092 bytes
font_01_sfnt_off0000f17f.bin
ed0279d1f75d61c028092b1a7286e7ab409e1d4f42c07c9408312d0a1bb37eca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 11208 bytes
font_02_sfnt_off00010b9c.bin
b7173925bd460e900783c3d87598939936637a11d335d81f0b00cd9f4d3b435c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9C 2404 bytes
font_03_sfnt_off0001162d.bin
5fc77f7eb5a6a40325102242b62001a592236d11cc87ccbd82a59d69049c7f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 17964 bytes
font_04_sfnt_off00014513.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14513 16792 bytes

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