PDF malware analysis — malicious · c0484df406182320

MALICIOUS

PDF

83.9 KB Created: 2021-08-12 05:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: ff09982f69a6e7780ad057a9f456d1b6 SHA-1: 0a80ba69a9929db9e6104fb1394fb7e5653e1111 SHA-256: c0484df406182320b9cf0c661d8297848a0ed09cb51037af2d9c1bc6d134bcba

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.6509

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 https://wineart.online/userfiles/file/naratodojibaja.pdf In PDF document text
- https://aakritidigitals.com/userfiles/files/52201454163.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bba21fa53---92002897118.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/801ac97a2085e09377430b411a08e047/topaju.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ddd30196e---gerudusiwepumulixovovet.pdfIn PDF document text
- http://medica-eg.com/userfiles/file/gunowaxegefativotinixuxa.pdfIn PDF document text
- http://regalmotors-jp.com/js/upload/files/dexire.pdfIn PDF document text
- http://coffee33.ru/archive/file/xejuruzalifijoz.pdfIn PDF document text
- http://fatamorgana.fr/uploads/assets/file/61964912096.pdfIn PDF document text
- http://kingcraftviet.com/uploads/ckfinder/files/24484761700.pdfIn PDF document text
- https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2da07d6b7---23476195952.pdfIn PDF document text
- http://easthighclassof1962.com/clients/2/24/240b89ecbeded73b1ae3fdc7544f4fd7/File/79209442507.pdfIn PDF document text
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9aa1eb5e2---bozalekogati.pdfIn PDF document text
- https://girilawfirm.com/content_files/files/jurika.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30afe97b86---2969720691.pdfIn PDF document text
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/pq1krnvlevn2o2pav2st6s15g0/40152042583.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5c5b621ced137990bdbdcafd30cba3b6/33531075864.pdfIn PDF document text
- http://mazurubezpieczenia.pl/zdjecia/fck/file/17785837562.pdfIn PDF document text
- https://jotekonybakterium.hu/userfiles/files/gomefajowunugunak.pdfIn PDF document text
- http://udelimpa.es/ckfinder/userfiles/files/82076229684.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091349f4e39e---20808030314.pdfIn PDF document text
- https://dentalrud.com/userfiles/file/34073694481.pdfIn PDF document text
- http://playbabydoll.com/userfiles/file/35508706200.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ff6db0cad41---bobizajezekigelorukefinop.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/oeuvqhmf3gq3dqn1umr6aq36ae/7680214958.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ebcc052f9cf15259c4a57b157618ac50/gibarewi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ejercicios+de+m%C3%A9trica+resueltos+pdf+1+esoPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f602.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF602	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010e19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E19	11096 bytes
SHA-256: `a4f0c93dcc8e57e5b77339e8e6969a73c572fd3f0a8d8cfaf50ee1e4aad2e5a7`
`font_02_sfnt_off000127b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127B5	18392 bytes
SHA-256: `1a87a8d059d91879a7fdc385f60d226f7d71a6abf8e8b7c684185a0ef1d0efe1`

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