Malicious PDF — malware analysis report

Static analysis result for SHA-256 6875c5da3fecae26…

MALICIOUS

PDF

84.4 KB Created: 2021-07-25 17:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 962fc30cd63a2488e442c4b3146564f2 SHA-1: 872f39acaa0f0c0ece4ac93f7fcf86e3a0087846 SHA-256: 6875c5da3fecae26bbf17fc59ffe31bf5c349345c1a211e2f59ea841f518de68
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress upload directories, suggesting an attempt to obscure the final destination. ClamAV detected this file as 'Pdf.Phishing.Trojan', reinforcing the phishing and malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7825

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/degewulujudamet.pdf In PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079514dc20dc---65526795424.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c785564c0---mufowevutarudo.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/raxivefomasomovegigujoga.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/konidudonuxen.pdfIn PDF document text
    • https://hssanesteban.cl/files/vipisebeka.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tchadm1nraqlm4pc9n1jm5qnb4/viwemipasike.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f010b9400c---1415334873.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608461a76d5c2---xevotikujebekoguxogojepix.pdfIn PDF document text
    • http://punaide.com/userfiles/files/12769920750.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086af4a9b2c9---70612844461.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608558460dc2d---25241170970.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/se1n3f3vleqr2qb3djld99mr5u/zanotekure.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607164b4094f4---74656145992.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/wexubirusijivupen1622282170.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/waxasiladoxisezodukoriw.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607128c4a8fa2---48218030702.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/c171a1c4eae87a037079b3c122ad1029/67492579184.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/64525416376.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/52768485508.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/fujawifuponoxosex.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49e156a050---devalanovalaga.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/85179404351.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160f20eb16e1fd---37126733548.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hvhkmubbcbih8lut73pf1okfv2/donasojajerutituza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=due+diligence+report+format+pdfPDF link annotation
    • 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_off00010009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10009 17240 bytes
SHA-256: 040c8bd16029f978f95e67ce40979e7b0b6cac5c56ba13b2a3585e7b5d39ec26
font_01_sfnt_off00012cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBF 10896 bytes
SHA-256: 217480fc19abc3bc746198c0f285c876ae64d2a9baa0556767cbc9a269c620f9

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