Malicious PDF — malware analysis report

Static analysis result for SHA-256 800466b81f655dec…

MALICIOUS

PDF

80.0 KB Created: 2021-08-18 00:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 627a864ac4b1e4ef6a59847147dc336c SHA-1: 6e48d827d01ad1d4e2cf6a57e7172d50f2a39392 SHA-256: 800466b81f655dec15e8a678b3b6d39aba1ac028df5f1a6143bf330357b9d394
94 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, serving as a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8567

Heuristics 4

  • 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
  • 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://huntic.ru/uplcv?utm_term=electronica+de+potencia+rashid+2da+solucionario PDF link annotation
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/a19f54929bb420eb2dca01cb62f388bd/10069822617.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/31505121984.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/lejezeve.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/laxibixujima.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610e76d2885a4---74380364339.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/gomeputagamur.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a83579c6fe6---93475229144.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/faviziwepesasukenowibu.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/sexazujofefas.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/93fmsojmvn3hbnvcfjes135ch2/89087924412.pdfIn PDF document text
    • http://df-foundry.net/d/files/gaberezenegopawobosumis.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1dc65735f---wixikiravikelawudiminuzuf.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/saxuzunopozalix.pdfIn PDF document text
    • https://susta.vn/userfiles/file/wezabojevepowirovagonok.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6f7eed11ccfce082c2572ddda8cceb88/57145364729.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/8936846709.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/2132531312.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/jspv5umfmhuin2csanoqnd8fgs/69684062234.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3cbdd183642a3a792e9552bc20d267f0/3026886525.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16115182f5ca5a---94881262306.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/kolokobosek.pdfIn PDF document text
    • http://sciattella.net/images/file/39208642733.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/vv92lqcchcu9kso437vhp123qj/75086654668.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 10816 bytes
SHA-256: 095da5836b72d657df476c8a1890cccfc4f205e024e13a873be41efca0bccbbe