PDF malware analysis — malicious · f4003c49b006e7a3

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 05:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 74f7c79e3c0184162b2972a387703beb SHA-1: d600cd94d4d746b44770f5c1678302bbe0f7b60a SHA-256: f4003c49b006e7a31194b45ecca91335069d9cb74fc498ea7b4b5b301c85c776

64 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to other PDF files hosted on various websites. Several of these URLs are associated with compromised CMS upload directories, suggesting a pattern of distributing malicious content or engaging in SEO spam. The file itself does not contain executable scripts, but its structure and the nature of the linked content indicate a malicious intent to redirect users to potentially harmful resources.

Machine Learning

Nyx PDF Classifier suspicious score 0.4173

Heuristics 4

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://denki-shonan.com/uploadsfile/dovosigalowavelimanad.pdf In PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/e66521cb278655fdae626145486d9a5a/gesiwibozikakeparux.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b7278956c---36312458569.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075fe3bb9e55---94335460531.pdfIn PDF document text
- http://doktor-okonski.pl/uploadimg/file/84984297634.pdfIn PDF document text
- https://igk-lilienthal.de/downloads/wuwakalenalazomarugexuxi.pdfIn PDF document text
- https://ddmmaze.altruistictech.org/documents/img/upload/files/20831320944.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811d09c02b7---guduzatotojipadumagomarol.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/6cdd07670897f2cb3a2dc788b29e2134/46258528960.pdfIn PDF document text
- http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/38014988833.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/76c2aa5d5a2fd98cd2575855cafd3bf6/47929060252.pdfIn PDF document text
- http://1hozain.ru/files/userfiles/files/25513058785.pdfIn PDF document text
- https://congthuonghotel.vn/app/webroot/files/images/pages/files/wetesifulijegogujal.pdfIn PDF document text
- http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/gewizinonijulezuv.pdfIn PDF document text
- http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e30a1c899e---39638680400.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5686f2b1d9.pdfIn PDF document text
- http://tgroupsrl.com/userfiles/files/12070968295.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/30abd065fa118eb7ae79915e1a5076f9/gojowijusovubez.pdfIn PDF document text
- http://stalmost.pl/userfiles/file/32528971734.pdfIn PDF document text
- http://emachn.com/data/attachment/file/76211899848.pdfIn PDF document text
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0eb1af562128a69f5d390edc3c69e579/39797275532.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bd158dbc515---22655573847.pdfIn PDF document text
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095e75cd9caf---81817017731.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=history+of+the+philippines+timeline+pdfPDF 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_off00010ab3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AB3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000122c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122C5	18404 bytes
SHA-256: `a0f3ef73a5f8394772b678fda31c038a1d8d9a725a82cc8aba77e5db060e0986`

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