PDF malware analysis — malicious · e53102ce86ef4204

MALICIOUS

PDF

80.2 KB Created: 2021-09-04 07:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01

MD5: f1240999d11b805c351882c455d01afd SHA-1: 9126fca54759920436ce8e1f1616f859d6b583f1 SHA-256: e53102ce86ef420427c7ec9ecdfbcfebb415d6c60ae7a5c6a1a7bace5d7befc9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.7217

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://chandrakantmusicacademy.org/ckfinder/userfiles/files/15356669166.pdf In PDF document text
- https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/c7bd242d4c8eed67d3e40ea4dcf4ff7d/99151113497.pdfIn PDF document text
- https://floridainvestment.cz/files/file/56212592486.pdfIn PDF document text
- https://supermagnum-bg.com/userfiles/file/gofojufuxivekijese.pdfIn PDF document text
- https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/26906239812.pdfIn PDF document text
- http://geriatriccarenewjersey.com/userfiles/files/24343959771.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a2ea5c8a084554947f254a2463fa379/34800550359.pdfIn PDF document text
- http://rld-carbon.ru/file/manofovijitinojevi.pdfIn PDF document text
- http://mnogonomerov.ru/uploads/file/vukizaro.pdfIn PDF document text
- https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/729921f037bc503999674331497c4587/befebezajebikupexigexor.pdfIn PDF document text
- http://vonschickenconcord.com/uploads/files/fataz.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9f822bb91---80754206680.pdfIn PDF document text
- http://studiosiciliani.eu/userfiles/files/40658940499.pdfIn PDF document text
- https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/f9bdaca67ffd5f2e0a273cec44632c3b/58466815952.pdfIn PDF document text
- http://peaceinsrilanka.lk/userfiles/file/59122385923.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l8b5t000m3vurne9j7p94t6n05/34878267873.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc2ffbdcce---fifuvagivelilom.pdfIn PDF document text
- http://aumnat2car.com/ckfinder/core/connector/php/upload/files/zosuxepapejobidanuta.pdfIn PDF document text
- http://sarlampa.ru/upload_picture/fakedelogitogavaza.pdfIn PDF document text
- http://myexamadvisor.com/fck_uploads/files/31883504270.pdfIn PDF document text
- http://agriturismolescuderie.eu/userfiles/files/sadadokupodojoxixam.pdfIn PDF document text
- http://biirbeh.mn/images/content/file/tagorazini.pdfIn PDF document text
- http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11795955799.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78240ebc66---bepiwi.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1edb3a8605---sowafiti.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=waste+water+treatment+processes+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_off0000f4c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4C6	17248 bytes
SHA-256: `bdfa23bcb2aa37a21b39a2a15f470a18b25964e771153f3b4c4a944ed0eced5c`
`font_01_sfnt_off0001218e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1218E	10724 bytes
SHA-256: `d9d445f4c0e4823f597ad885e93e4f0663af144fd2d638fff0c48259eb372215`

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