Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4552367bbf2e781…

MALICIOUS

PDF

119.3 KB Created: 2021-06-28 04:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8c11cfc6a1efe27845816b3fd699233c SHA-1: 33339f7464ab2c81c6829b553525e3d7a15710ce SHA-256: e4552367bbf2e781b47f60857322457716f2de2ac26af3b3b755ba2d78365b8c
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3224

Heuristics 5

  • 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
  • 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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cf52d6c90---ketatemowadivuzusakivep.pdf In PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7593359c---midasuvanovotojajix.pdfIn PDF document text
    • https://signika.pl/Upload/file/nugajabuwu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4980a46ac1a7ce82bf45b60dd9078704/zuzemitopifo.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/t5t2vhf7c07fs09ieas0ofre5v/19514309172.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b847ae3e1---taxogetixuzesodovomafu.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/69bbcc9cf594e1848c36226dddf4a41b/piteb.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/140f552969844d56d0db42f7a1a52d30/39309851840.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/xugubon.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/dujane.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/zowibusobegoranix.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160caa918c7ce1---jewuwogodujuripofunuko.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2adbb82245---25116740396.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/54a794e7eabd1c836ead0bb0f5210662/17399499904.pdfIn PDF document text
    • https://capecoralliving.com/media/file/33734589264.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/87362495820.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a943a3ca4f823585385c57ed90a94bbc/xexoda.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/4f9bac802784322dfab0ea16f10bf89a/67370010010.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/60987537563.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/63880009781.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076036a3ea63---90976340817.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1597c0ba79---watemiwozuminobenewaxiko.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c752351ac40---ripigusipadotaponajezirin.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/d52qkc8ge5a91g2jn681lpsjfu/20004396181.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2149e78ae4---wetedegiputaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=it+would+be+goodPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 10076 bytes
SHA-256: 651dc146f9687e5ce667199524a58ed00980b767d85bfd7f332af4e6910d21be
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 75424 bytes
SHA-256: cd283d9038092af77fe9c93cd67e8768a6d10b9957be7c40a0a280a085d42485
font_02_sfnt_off0001c777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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