PDF malware analysis — malicious · 68dfaea34ad9f963

MALICIOUS

PDF

80.4 KB Created: 2021-06-26 16:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 910fc9f2603f3f368820bbb78406d910 SHA-1: b93e1ebbdda100b9bb57330fdf0e97b579ea000b SHA-256: 68dfaea34ad9f96391dabcd9881407147f5fedb09276e4648ee2361ec60ba189

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detections.

Machine Learning

Nyx PDF Classifier malicious score 0.8005

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 http://ibtaker.ps/userfiles/file/paxanabemekipu.pdf In PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a9c6366c661eefdc8f43741867eac9fb/35682010812.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdd9e7f854---9643977670.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160845a7a38071---mirefumekewemusizaveram.pdfIn PDF document text
- https://szaniterplaza.hu/ckfinder/userfiles/files/bixesixazefirimikebuga.pdfIn PDF document text
- https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/6vp4eq3l29bece29qfj5i3fln7/wavarofazagofevijifusana.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b78b6675196---kitivax.pdfIn PDF document text
- http://hieuchuan.com/upload/files/61905497197.pdfIn PDF document text
- http://teenmag.cz/userfiles/file/28040877023.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083568a65948---zuzujitep.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef773f0322---misokevororezivol.pdfIn PDF document text
- http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gidijozomita.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/10fa7e91b8d9284065980a379467878a/nodefuwimokiwam.pdfIn PDF document text
- http://18554080.com/userfiles/file/36064482947.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7d1d913a---zivujufowarafuzelosipinar.pdfIn PDF document text
- http://rockpapersun.com/upload_mce_image/file/92613093816.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae719e9501d---xusavelori.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a950bc2cb8---newixonewata.pdfIn PDF document text
- https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/042c3f2c0672415df35f9b00406ac8cc/paloramuratojubit.pdfIn PDF document text
- http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/xupolowekefitoxerew.pdfIn PDF document text
- https://examonline.org/examonline/userfiles/file/waxakerupiz.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=minecraft+scariest+map+everPDF 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_off0000d511.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD511	9176 bytes
SHA-256: `1b56c013643a5808f86698df0391fde8dc9571b69daa14be86d6f7f0685bc285`
`font_01_sfnt_off0000f313.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF313	10532 bytes
SHA-256: `d20b296ae93a6c3d6ac45c583cc361287295dd6b11e841327fdc1fdaf1b728cb`
`font_02_sfnt_off00010b17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B17	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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