PDF malware analysis — malicious · 490e63a3e4a83a3b

MALICIOUS

PDF

78.1 KB Created: 2021-07-15 20:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 90cc071869799a6e7162992fc890380b SHA-1: aedf8b23fbb99339813153279aa6da78954726c7 SHA-256: 490e63a3e4a83a3bc4e268195970fdc22fe3c098b10a60c5704145f41a7e64de

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier suspicious score 0.4580

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 https://medvor.ru/uplcv?utm_term=lose+10+inches+of+belly+fat PDF link annotation
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/o6g4p9ft6uhlmcsq3n0npsefbd/74638894654.pdfIn PDF document text
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609042f489815---fuzowozatifowuguwe.pdfIn PDF document text
- http://aaaexpressac.com/userfiles/file/vabifer.pdfIn PDF document text
- http://doks-films.com/pcms/content/file/tumusopu.pdfIn PDF document text
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/8aaa8bbe518c8410322b520c2cc633f6/sopabufiwani.pdfIn PDF document text
- https://pcstaiwan.com/ckfinder/userfiles/files/gazikikoxosomuladadet.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/60f3bd971e58038889be5b6165ccb6e5/88750121552.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/3d455b84066f7cac03ec7aad7d08b195/larozavitobazimisumov.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092618336af6---goruxalunokovojizojeg.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9cd1dd2b008d37d840b84befc8fe4269/puzizavewomot.pdfIn PDF document text
- http://robalton.es/Albums/images/file///wuduvanaresisa.pdfIn PDF document text
- http://www.alex-vasilkov.ru/images/wisdom/file/wufetineta.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160757e5f10db2---16259451326.pdfIn PDF document text
- http://vienkiemis.lt/app/webroot/uploads/userfiles/files/rewiwot.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e257ca63---63034050649.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/f8363f51ec1c2d79ef262eb7871a884c/sometalaxipelolil.pdfIn PDF document text
- http://anhuizpyy.com/upload_fck/file/2021-5-1/20210501081028592542.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/3c4df79149a3ca501704f723c1dc2b9d/disagoniwapuximubozar.pdfIn PDF document text
- http://wooshin.kr/uploaded/file/78426353460be07705afc2.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c591946c6a1---80842690822.pdfIn PDF document text
- http://bryanhigh78.com/clients/72554/File/saxip.pdfIn PDF document text
- http://kurier48.pl/files/userfiles/file/1626205328.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/zetatoxajagatoxabafav.pdfIn PDF document text
- http://barbusci.it/maisUserFile/file/nudobikasutekexexigim.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_off0000ef6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF6E	10720 bytes
SHA-256: `b5b136cbc547295b3acdcd2027c3fcb545b07b3c61acebf0bbe565c22e74c9d6`
`font_01_sfnt_off00010810.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10810	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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