PDF malware analysis — malicious · 4b2937ea6e8d25a9

MALICIOUS

PDF

90.1 KB Created: 2021-08-03 06:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 9b29596a22635ff1f0efed7022c677f3 SHA-1: 7c00d0ddaf3feb17ca39a776cbe50753383ef17a SHA-256: 4b2937ea6e8d25a93d4f5583db8f4eb6519912bf3b16f57148bdb058d09fc1de

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The presence of 'utm_term' parameters suggests an attempt to track user interactions, common in phishing or scam campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9122

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://synerhu.ru/uplcv?utm_term=star+wars+d20+pdf+free+download PDF link annotation
- https://asthasupermarket.com/userfiles/file/zuxegisav.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/131dd92f5c95ab82fcb62d6d5f0190f5/towotiroboko.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/41453613386.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806a50cc011---33801333320.pdfIn PDF document text
- http://www.startservis.sk/novy/ckfinder/userfiles/files/zudagoxakejeletiramuketez.pdfIn PDF document text
- https://circolodelpistone.ch/userfiles/file/7844112558.pdfIn PDF document text
- http://hugslock.com/app/webroot/img/files/67406791913.pdfIn PDF document text
- https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/7bk3d2pft3rsk21cj0v1s07qj3/marel.pdfIn PDF document text
- https://anpheatingandac.com/nbloom/fckuploads/file/jinulekip.pdfIn PDF document text
- http://geoman.cz/data/file/radumusumevijokimodubu.pdfIn PDF document text
- http://woodwork.pl/ubezpiecz/obrazy/file/kukan.pdfIn PDF document text
- http://globeksa.com/ckfinder/userfiles/files/bedutisofuki.pdfIn PDF document text
- http://leebyunghun.org/new/upload/board/files/20800640343.pdfIn PDF document text
- http://lacasedescaraibes.fr/file/kedomoserarifefeto.pdfIn PDF document text
- http://efuegypt.org/userfiles/file/tavijipijuboterefigeludo.pdfIn PDF document text
- http://aci-immobilier-douai.fr/userfiles/files/13167230507.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07ebb21c24---89162682351.pdfIn PDF document text
- https://bnovum.hu/downloads/83572688515.pdfIn PDF document text
- https://mk-promotions.com/ckfinder/userfiles/files/97843189638.pdfIn PDF document text
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d0df78827---81420509950.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/s5ms031tme7bm1ctp8rb12hd56/8636400701.pdfIn PDF document text
- http://onlineexpert.in/userfiles/file/7093927264.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ada8a20520f---45614655296.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010f0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F0E	10800 bytes
SHA-256: `43ce2e685d4365708a4917c7f7f9510ab149896ee17deb40defbccf9071d6b3d`
`font_01_sfnt_off0001282b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1282B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001403d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1403D	17464 bytes
SHA-256: `4e2e4c84573692428afbae5f67626eea55c81665a1d7370d531ff8fcb181dc9b`

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