PDF malware analysis — malicious · 3a4764c72b00a4f0

MALICIOUS

PDF

64.0 KB Created: 2021-09-22 21:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8d702c480fc7cb714a14cd4c0bc2a7a8 SHA-1: 7ece28ff1ac8c1ce8ebf1b990b14e5826df088e5 SHA-256: 3a4764c72b00a4f08d30c2a3a211554ca0cb25497ac6046bb0c1a70c10a287e7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous links, including one with a 'utm_term' parameter suggesting a lure for potentially unwanted content, indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.5661

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://pixomot.ru/uplcv?utm_term=sex+game+apk+download PDF link annotation
- http://aaaexpressac.com/userfiles/file/sabevanodukoliganoju.pdfIn PDF document text
- https://ixiu-23.com/uploads/files/202109151538417512.pdfIn PDF document text
- http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/69148123750.pdfIn PDF document text
- https://rtvpuls.com/ckfinder/userfiles/files/51317694084.pdfIn PDF document text
- http://doo-san.com/userfiles/file/20210922172850.pdfIn PDF document text
- http://a-aqua.fr/ressource/site-image/files/72561084154.pdfIn PDF document text
- https://phoenixturkey.com/upload/ckfinder/files/fowavuf.pdfIn PDF document text
- http://fitviewer.info/files/file/98917429968.pdfIn PDF document text
- http://benhvienlaptop.biz/userfiles/file/bimajarimarem.pdfIn PDF document text
- https://danfort.lv/userfiles/file/vasopovaderi.pdfIn PDF document text
- http://erbamedica.org/userfiles/files/ketojusebanav.pdfIn PDF document text
- https://yourwebcenter.com/files/file/1418751330.pdfIn PDF document text
- http://ingpiazza.eu/userfiles/files/pilufofixowisiza.pdfIn PDF document text
- http://aucontecnologia.com/userfiles/files/69291774006.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/c001ce7217f72bca191ee32797790500/zefuzuva.pdfIn PDF document text
- https://northwestconvention.cz/data/files/mofeludebedunifazel.pdfIn PDF document text
- http://alpha-th.com/userfiles/file/depaw.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5c214b2a1---91845494734.pdfIn PDF document text
- https://canoe.ro/Extras/ckfinder/userfiles/files/95143595952.pdfIn PDF document text
- https://www.ccs-corporation.com/ckfinder/userfiles/files/81035337115.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ef5c39334f17ac71519ad7ee00c18b95/gawutomagota.pdfIn PDF document text
- http://komputerzagrosze.pl/userfiles/file/tebedejetadimuzazewerek.pdfIn PDF document text
- https://kenkochaya.com/user_data/ckfinder/files/82780285498.pdfIn PDF document text
- https://kueapem.com/contents/files/nodemekixipiwiwume.pdfIn PDF document text
- http://friulanamarmi.it/images/file/81865395418.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_off0000ca33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA33	10632 bytes
SHA-256: `55485d58f4a7ac6cf05964584e58b98ff9aa7a2269e61a880d3f58c7ee50e25b`
`font_01_sfnt_off0000e265.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE265	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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