PDF malware analysis — malicious · 07d49c7e8d5fc440

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 05:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 21e6a9736932d438a6de2eae1151d4ab SHA-1: 5a2449e034a2fb2fd809b1582e9b963b711243ea SHA-256: 07d49c7e8d5fc4404ff9bcbc22d0aeec2387a4e7e8eedfee2c8dad335bf0c7c6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to various websites. Some of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution point for malicious content or phishing lures. The presence of multiple links and the nature of the hosting suggest an attempt to obscure the ultimate destination or leverage compromised infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.7431

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 http://buyyoutubecomments.com/ci/userfiles/files/14015292376.pdf In PDF document text
- http://vietcem.vn/public/default/ckeditor/files/nupalunojuwagogeb.pdfIn PDF document text
- https://deltagroup.bg/uploads/file/rejogod.pdfIn PDF document text
- http://chinhsuasolieu.com/media/files/kogovibobuvenosu.pdfIn PDF document text
- https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/89525164912.pdfIn PDF document text
- https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/08c773ad43006a992cb1ffd947ec913f/buvegevafosividomikilopo.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae393afb35---86112537699.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/hvd9r4p4rhhs7km3lsg0mc1cp0/31983662632.pdfIn PDF document text
- http://davidhammerstein.org/ckfinder/userfiles/files/16126549595.pdfIn PDF document text
- https://la-klamm.org/Files/files/dutoratazimodijaguwod.pdfIn PDF document text
- http://beiks.info/public/file/62155917289.pdfIn PDF document text
- http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/pudilulitogowusekojukojez.pdfIn PDF document text
- https://mut-zur-veraenderung-hambuch.de/userfiles/file/vufetofexebutedawoweva.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/97961433388.pdfIn PDF document text
- http://waterlootour.com/FileData/ckfinder/files/20210918_DBE23BBD78324DD0.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161433639746ee---numuloxukugazoxeneluruwa.pdfIn PDF document text
- http://benetalent.com/upload/files/kikegatoxajanulutit.pdfIn PDF document text
- http://huyndaicaudien.com/upload/files/zafezeredaxuji.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/lvso688q4cfcl6rnf5of5000m1/kupel.pdfIn PDF document text
- https://gosselindesign.com/images/from_fckeditor/fichiers/33917252904.pdfIn PDF document text
- https://mytopics.it/uploads/file/jogelabonigazanegopa.pdfIn PDF document text
- https://ptogel2.com/contents/files/jipobaxemewadiledise.pdfIn PDF document text
- http://bluecreator.biz/ckfinder/userfiles/files/69813820858.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614224877957c---boninifakirux.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=symphony+android+phone+price+list+in+bangladeshPDF 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_off0000ea97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA97	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000102ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102AE	11292 bytes
SHA-256: `377f262b5043ec1dc38174d2c0c1f2cc363333f8c1f77ddf3b8a1aa2e673f0f4`

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