PDF malware analysis — malicious · d99e4ff96798f635

MALICIOUS

PDF

77.6 KB Created: 2021-09-19 08:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 4e6549c370b50e8e3c32fa63983ba748 SHA-1: cca68b4ff4b4ff3e33f4ede0d736af7ea296e63a SHA-256: d99e4ff96798f6350c10ccf85d54608be5c27f3080ca5c95fe834ef38cc5b7f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such links, often with UTM parameters, to potentially redirect users to malicious content or phishing sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.6826

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.
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://drafthe.ru/uplcv?utm_term=mumbai+saga+watch+online PDF link annotation
- http://aeon-dev.com/uploads/files/202109022102373658.pdfIn PDF document text
- http://stacjaregeneracja.pl/userfiles/file/98290451706.pdfIn PDF document text
- http://www.accl-calibration.com/login/ckfinder/userfiles/files/vufikekopumo.pdfIn PDF document text
- http://innovad-ltd.com/userfiles/file/70005752938.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614164628f524---32032244276.pdfIn PDF document text
- http://sonarkella.com/userfiles/file/ramanuvejezebivone.pdfIn PDF document text
- http://cs-golfclub.com/ckupload/files/kasoxef.pdfIn PDF document text
- http://kfbma.org/files/fck/file/17954741607.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614001dc01637---84268842231.pdfIn PDF document text
- http://realcomfort.ru/content/upload/file/foxafaxiwoj.pdfIn PDF document text
- http://xedaphcm.com/luutru/files/nixajewapuwe.pdfIn PDF document text
- http://hotelclinton.it/userfiles/files/61309206358.pdfIn PDF document text
- http://colorfusion.us/admin/images/file/25474927618.pdfIn PDF document text
- http://benevolo.it/userfiles/files/kuditosupurawatabasux.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3c5fe23ef---mukudo.pdfIn PDF document text
- http://4998horo.gmmwireless.com/contents/files/bokoligodogil.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386d52643f3---82670314936.pdfIn PDF document text
- http://ristorantebiscione.com/userfiles/files/lulutepituro.pdfIn PDF document text
- http://theclelandgroup.com/img/upload/file/digima.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nqhp36rtv74ngqo01dj1k6ooc1/kadefokexowuno.pdfIn PDF document text
- https://cvsc.co/userfiles/file/59929340056.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380879dcec7---lukokozim.pdfIn PDF document text
- http://thingsantiquesla.com/userfiles/files/vudebobewar.pdfIn PDF document text
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d526.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD526	18184 bytes
SHA-256: `126eda11a525df9714e40db54248db7dfc3656e7936e07350c95ebc09d81c839`
`font_01_sfnt_off00010476.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10476	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011c8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C8D	10896 bytes
SHA-256: `d9375709d20f37841244f6be056a75bff8fa7b9a4a8e3f28da2e291c9d225a5e`

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