PDF malware analysis — malicious · f33fff91d61a50a6

MALICIOUS

PDF

78.0 KB Created: 2021-09-03 21:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: b68aec937f82d618f4e584aaaacc7a16 SHA-1: 3373c22d18c5b3a36053617b257406f50d543500 SHA-256: f33fff91d61a50a6f4fc6efc6548e96e399896c87d6f076eac966cfe193b1d31

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or downloads. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.8587

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://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8ced1bdf2f079a4bda851d5212d70b17/9481868596.pdf In PDF document text
- https://mogilew.ru/userfiles/file/pozekadaruval.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ndpmqa91d4sq9dcng29lfh5qu2/52830491911.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd85268d70---5082504779.pdfIn PDF document text
- http://secretinvitation.net/images/files/4538807955.pdfIn PDF document text
- https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/9ea0ea5155948e82255b3bf62f99dcf8/3840846811.pdfIn PDF document text
- https://vibangthuaphatlai.net/uploads/files/66557278059.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add1f4adf8f---74986684150.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/i6dsl1uclrqe7qgnqo1m0b99cd/50982092920.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/l7afej9av97ng144fngo06v2sq/55239356888.pdfIn PDF document text
- https://bluetact.com/ckfinder/userfiles/files/xuzolelokokikekumofo.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/463vfd5n3710dj9f1g0qkshnq2/14315335365.pdfIn PDF document text
- https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/91e2ba11920f4a969b07707c6be7a68a/60206227266.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/hcjdnf2r5h2pksat7n0qb1ghpu/23690663493.pdfIn PDF document text
- http://robwalker.net/fckupload/file/57916853939.pdfIn PDF document text
- http://hairtransplantmangalore.com/uploaded_files/userfiles/files/45222883131.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5661b8d0a---46676227958.pdfIn PDF document text
- https://eyetracking.pl/userfiles/file/49002722721.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/44c1239da705f87f4a8725531244abbf/jisiwetoxureveruwa.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/dixikalexewowak.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/nc3ce4nebf8l1ccsgreik1tr9t/jumonusiguxi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sundararajan+sharing+economy+pdfPDF link annotation
- 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_off0000d9a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9A0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f1b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1B7	11344 bytes
SHA-256: `d03a9900c9adbbba6ae7152c07bce6914fa381fadc6a453b882caafde76a6d48`
`font_02_sfnt_off00010bf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF7	17952 bytes
SHA-256: `472b1d6633ce3e1a4fcf47fa3b16e9d85b133aaa5857dee95507e6a8638b500b`

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