PDF malware analysis — malicious · 255755b26df7b9e5

MALICIOUS

PDF

72.0 KB Created: 2021-07-02 22:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: 50d1ab9b3bd2f0fb82b6221095531bb4 SHA-1: f008fef550e32028658fe430b17be3c90b29e7dc SHA-256: 255755b26df7b9e57ec1b9130ab0bd1f5f732d8683cdb0bcf0b161f9ee31c930

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

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.
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://dongfangguohua.com/ckfinder/userfiles/files/69634319821.pdf In PDF document text
- https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ad65d37a926b9bcfb5009b77ead56a8d/sifetufisaxufigugara.pdfIn PDF document text
- http://alrabbancapital.com/file/files/negar.pdfIn PDF document text
- https://atraba-holding.com/userfiles/file/62985573793.pdfIn PDF document text
- http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/zoxujazexa.pdfIn PDF document text
- https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/56938676506.pdfIn PDF document text
- http://cymagun.com/userfiles/kejoxotubugik.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/99198665247.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160adef49bb340---57801473335.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/qf48ubu4usdgmqehpv0athao23/69827204241.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073cdef4f272---joxutidepifimaniv.pdfIn PDF document text
- https://cihangirhotel.com/upload/ckfinder/files/tugunugurekumezane.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/32385901101.pdfIn PDF document text
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9001ad3f---vamuxalumujiz.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086e49e590fa---mogadaxolexi.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67cb6d067---4741289909.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/g21sa2bv42d8mk06eh5c3dgtg7/88132344892.pdfIn PDF document text
- https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e1427977ad9cfb22433d8d7b563c4763/68908390867.pdfIn PDF document text
- http://speakingaboutnetworking.com/ckfinder/userfiles/files/podasafasewejenoxowek.pdfIn PDF document text
- https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3c798ef46---lujevuj.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16081718550e5c---redevaxalumida.pdfIn PDF document text
- http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/uilmh9tv6u2rm58l3m5cefq54l/47260856787.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=epic+7+pc+downloadPDF link annotation
- http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c164bd53a2d---35767953817.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e500.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE500	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD17	10128 bytes
SHA-256: `656a8674ba9ea2bf3cc3d78170eda859dac533380cf6c6e2295dd8c0e443130d`

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