Malicious PDF — malware analysis report

Static analysis result for SHA-256 3222d18a62d05729…

MALICIOUS

PDF

78.8 KB Created: 2021-08-07 04:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdb790575ccd45df17e98967ab2fe090 SHA-1: d49b216fbfdc1aff84382a55b8be1319459215d9 SHA-256: 3222d18a62d057290f78dcb34089f8c85bab660fe4a7c3662f2b5659766c89f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to lure users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://inwebjor.ru/uplcv?utm_term=quiet+the+power+of+introverts+quotes+with+page+numbers
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/1e1amjd31d9fj73u931h6ffpql/78138417441.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/pifujewet.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/97ce157be19b0e73b56c97c630c20d4d/pomadelotimagexolirofotop.pdf
    • http://svsteinfurth.de/radsportfiles/file/wibuwit.pdf
    • https://divinenine.net/userfiles/file/35467862135.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609432f9b3255---32867050671.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/4697755c6d3558c96542da4e385836ff/81208255499.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cad08e9a60---61412945509.pdf
    • http://studiobaliva.eu/userfiles/files/wigofavetotamu.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076349d3c1a7---82991420511.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/61211735163.pdf
    • http://landia-print.com/pdir/file/88540011264.pdf
    • http://pettwayfamilyreunion.com/clients/39389/File/41423708693.pdf
    • http://ztkammer.at/uploads/file/ginekoruzewogezajojim.pdf
    • http://progettarecasa.com/userfiles/files/5576233030.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/bamek.pdf
    • http://lapawan15.com/shop/fck_file/file/21623813050.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/pewojekeli.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/549ad99ccd488578e64a2a713a42e5fd/gibatupigavozaja.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd6ee73b7a---newifotat.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/14c4a7266b987e695aec757a901ba6aa/zawameduxur.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610631cd90dca---bofilabewudiz.pdf
    • http://muzycznescyzoryki.pl/userfiles/file/vepagewunamizukakedunogo.pdf
    • https://antae.be/app/webroot/uploads/file/84599048862.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_off0000cef0.bin
c7c2b0a69259000b4218d52f9d2deb9b2a887372378873e8a7b1db28f2d1cc86
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF0 11356 bytes
font_01_sfnt_off0000e924.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 16792 bytes
font_02_sfnt_off00010136.bin
61928f7d3ce4d4f596b34e4e8d8b6a822c57964e90faf9e5c55dd2b5350a24bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 16836 bytes