Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b6b1dd120bb59f…

MALICIOUS

PDF

75.1 KB Created: 2021-07-04 01:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bde36927eb8230e25031243dd46e96d SHA-1: 8172213de0192337045951da124aea69b1cda3d9 SHA-256: 46b6b1dd120bb59fc941f764799295ca50557a27304ad94316bdb0ec38aea9ec
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports the intent to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wastran.ru/uplcv?utm_term=convert+large+word+document+to+pdf
    • http://pogservice.ru/userfiles/file/xesuwojinikofibuxukesaxun.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf844eb9ec---24244075740.pdf
    • https://ferdavagnar.is/images/fck/file/9511028537.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c98e5b11f8---zejave.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0e8accd68---bejowemeralapujufafed.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8947817cb---43074297556.pdf
    • http://lab4050.com/upload/editor/file/kuwipokuderinupa.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/29d08485a257eca08d46ac06d4c1225b/mibasemotabolenozumalus.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/de3d57919aba436334de162dafc81af3/84391705582.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e3c1f61e190781d1a91ebabf71c3b05/vepulegimonidav.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/118f2a5949ac7b104bfbde37008f9760/lefironixudalerumu.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc001b2e101---tovexilozoxu.pdf
    • http://07-3739589.com/CKEdit/upload/files/legosarewonanuzuvumokera.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081981355c6f---muvokefuzanagad.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073d58bd74ba---davosadav.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/091dda54894d44b18798373d4d244148/fepusawejoxuv.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/dcd5089b10fa144047f60fd46db3326d/bisijutatewifuli.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608874dfaf90a---55182233436.pdf
    • http://ghinelliarchitettura.it/userfiles/files/31559567189.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/8773024a76b77cbd6b3084e6f2cda47e/wonavarabipiragober.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/21acf1627164ea7c8c0bbeacda971a39/11191851487.pdf
    • https://thisissati.com/userfiles/files/muludaguziwabaw.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608124881f0db---tedijovanelolofuka.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/135196fb08be1c62ae8ccaf68670ff64/tadiju.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_off0000c30a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC30A 16792 bytes
font_01_sfnt_off0000db1c.bin
9715b28b986484a6b103f999709384390f7990ba1224a83d241520307c382fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 16304 bytes
font_02_sfnt_off00010576.bin
e8812ce8e40a8434e1fbdcae75245be19a0687e5876114c642909b9210b19d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 10984 bytes

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