PDF malware analysis — malicious · 15a9960f719fb615

MALICIOUS

PDF

65.4 KB Created: 2021-08-12 00:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: dc72133ec8383159a5816c7478125a6b SHA-1: 7795b3a6b86a57255dec72078ce097cfdb7d01ee SHA-256: 15a9960f719fb6153707499255a9b6cdc79f60c42900bbcee46200cdaa4b4c9d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.8402

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 https://toskov-yordanov.com/userfiles/file/70903584501.pdf In PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fe4e642c009---medemazur.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/qfa095d59b099mqpg25mdsfagr/3114394890.pdfIn PDF document text
- http://heureka-cz.eu/files/6621182777.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/bbae4afb74f04486413bf37e67e066a5/18182900512.pdfIn PDF document text
- http://awkontrakt.pl/ckfinder/userfiles/files/22764357321.pdfIn PDF document text
- http://dailycan.com/userfiles/files/3156694258.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160de9ac5e3145---21011388405.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072eb0853c57---50154102815.pdfIn PDF document text
- http://proreferee.ru/uploads/ckfinder/files/novejokipetiv.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/d6b754c38b286d605afb8bc86e5f5a64/28097157147.pdfIn PDF document text
- http://dailythang.com/userfiles/files/32084578660.pdfIn PDF document text
- http://zuche0551.com/upload/file/wejumumig.pdfIn PDF document text
- http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb21b9980b---wesalewubibojaraveve.pdfIn PDF document text
- https://aplusadvance.com/naver_editor/data/file/tejilonawimuwenijud.pdfIn PDF document text
- https://afayl.com/userfiles/file/59018987926.pdfIn PDF document text
- http://fizjoactiv.eu/Upload/file/fijogapu.pdfIn PDF document text
- https://ietc-oman.com/userfiles/files/67043679440.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa171bdc253---31743138555.pdfIn PDF document text
- http://bularz-auto.pl/images/userfiles/file/78946439297.pdfIn PDF document text
- http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/faral.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/d0h2ca2emrmpdh8uel80r73gfr/27039409512.pdfIn PDF document text
- http://valsadindustries.com/userfiles/file/38642844151.pdfIn PDF document text
- http://songhakbbq.com/uploads/files/judezepowuvomubafon.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=home+decorators+collection+cordless+blinds+installationPDF 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_off0000c780.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC780	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000df97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF97	10664 bytes
SHA-256: `1976d75519100190bdc66a7b174dd78e11755d6c14cc2b00c62d537d78483533`

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