Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d62716e2786c67…

MALICIOUS

PDF

98.2 KB Created: 2021-06-28 21:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 163d93b75932882820a932904c15db2b SHA-1: d1d89d7d60b42b619c79ed80dda1926f9f68ca05 SHA-256: 30d62716e2786c678cf128def8e1123c18cfcf55bbfe2132efffc8c5d92f7df0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure and embedded links indicate an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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 http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7933e1bd1---1059955715.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5b197cbf37ba23b8e321f461cf128dbf/tobidarog.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c508e623e9f5aa24b667a92649ccf4b7/punarofumemejigube.pdf
    • http://vipnjl.com/userfiles/files/70633204860.pdf
    • http://dientrotiendathc.com/media/ftp/file/34920652129.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/e10055fab98150ea19cd47839d64af3b/47490543464.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2bdc938fa---9486938165.pdf
    • http://chromoink.com/updates/file/13151462378.pdf
    • http://studiodabo.eu/userfiles/files/26576904655.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/37d816e309b49d364c5fd3fd821945b3/warezegokig.pdf
    • https://bangprice.com/bangprice.com/beta/cms_image/file/4377023698.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f31c6eab9---49564335832.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4379c5cbdb---16920267074.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdf124f3bc---37312917977.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160859d0dab1ef---tisarebo.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/51b4cc2e0fff7266ee900830b5e8965d/87049257357.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c60e956cf2d---lonijatukamaros.pdf
    • http://seibyou-koujien.com/files/files/furewu.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a036358e4a4---wufizaluxeweg.pdf
    • http://aimic.com/userfiles/file/laripolosenitaxedufi.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608679d19ee2a---mujadexe.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924e8ac5908---31557292899.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/46ce4ba7e9c5ea8069751cb79530b772/ropoxusokedevoxidezux.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893f56cfc21---ruzakipofeb.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/07be7d3cdbc1fc09e8ef669c0b82e5b5/ravukakupiz.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/eo0mcofvjlqliqothrpo2n1h4o/58071737913.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=a+discourse+on+the+arts+and+sciences
    • 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_off00011bec.bin
522b107b3598fd9c464c38a658971010fe98a6eab4278f1f2eed1c4277ef8870
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 17932 bytes
font_01_sfnt_off00014b41.bin
de96a18dddc2e1dec3e3bf5867b0e05db9dba715cc33e3d569b45967efc85be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B41 10500 bytes
font_02_sfnt_off00016323.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16323 16792 bytes