PDF malware analysis — malicious · c198a197739e11f5

MALICIOUS

PDF

99.8 KB Created: 2021-07-03 14:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 87cb1c9b189db390251245f113842430 SHA-1: ae74da3e536d066407a7ec1585e0147dd226c887 SHA-256: c198a197739e11f57cb2930233fb5db77c9fb1c8243620bb2c1de633759908b4

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as Pdf.Phishing.Trojan. Heuristic analysis indicates the PDF contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were extracted, the presence of numerous URLs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier suspicious score 0.2938

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 http://cdmatik.com/uploads/file/50305918822.pdf In PDF document text
- https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b44a40ea5a82b194f753a10dfb7e18df/87848269974.pdfIn PDF document text
- http://wsp.pl/userfiles/file/63340778937.pdfIn PDF document text
- http://mnogonomerov.ru/uploads/file/tuvojagogedajakejoda.pdfIn PDF document text
- https://bestofbucerias.com/upload/file/losajozixede.pdfIn PDF document text
- https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/fcmmi1vo7699qiec6ighve9idq/gelexudi.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/3f6504e5de74e4fd9175664476088037/fafefokonupuxanatel.pdfIn PDF document text
- https://dienlanhbachkhoa.info/upload/files/kizuxunu.pdfIn PDF document text
- http://aimic.com/userfiles/file/87141697497.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa56f60079---sobewisigu.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aadf3143631---dujivut.pdfIn PDF document text
- http://bachova-terapia.sk/images/file/84304285930.pdfIn PDF document text
- https://aarhuskortet.dk/images/file/24495310575.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/05f258f9562db24e63b35042cfc21b82/69142694976.pdfIn PDF document text
- https://bursakaynak.com/userfiles/file/kalot.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b970deacf8bed036d5f0b0538f3e163b/28270603489.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b730d5b8b---lesonep.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9de2a089d---7401584265.pdfIn PDF document text
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/1433cffa50b3b202c27524042ca2e46c/89088903202.pdfIn PDF document text
- http://arablift.net/userfiles/file/36145615362.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079229b05da7---damivupikoxixelam.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d93d9235022e7f0fe5454378833c2874/juweluj.pdfIn PDF document text
- http://www.dean-cpa.com/files/adminpic/file/xiwekuxilogowa.pdfIn PDF document text
- https://studiorampinelli.com/file/gurenugipugigudefux.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=scp+939+89PDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ffab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFAB	16748 bytes
SHA-256: `3689bdb0943a7a37c63cad6618cdd46166ba9e3a1b02699e017d43f76fd6fc4d`
`font_01_sfnt_off0001169a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1169A	17168 bytes
SHA-256: `f67ae503d98853e28dee2c3396ad0bd6fb53c8073f4fa4c5d7773b24abc2a7a2`

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