PDF malware analysis — malicious · d5498d1fe57a593f

MALICIOUS

PDF

84.7 KB Created: 2021-07-29 12:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 71d407e21e3d599fd504620f357e1448 SHA-1: 31f99d64cd1a4cf9f474ae8e5a3bf0d7e559cb0d SHA-256: d5498d1fe57a593f38f9a1e6d2fac6899018ca810404b2242e244aaf8599ff4e

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to lure users to malicious content. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier suspicious score 0.4112

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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081ba5d2e6e0---zegosokazidoj.pdf In PDF document text
- http://cornucopiafrederick.com/uploads/files/22415607058.pdfIn PDF document text
- https://inifd.london/uploads/file/vukorugi.pdfIn PDF document text
- https://duocvinhkim.com/userfiles/file/vebamopemepilupiwaboruw.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422bfda2a3---kijazedesepatefiwuxi.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07b059775---91611568474.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076a456ab665---35803451650.pdfIn PDF document text
- http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/mamegiferafafemakeg.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608234dd2bab9---58962210442.pdfIn PDF document text
- http://www.sosonomo.com/ckfinder/userfiles/files/vomosizof.pdfIn PDF document text
- https://fonixkoncert.hu/upload/file/98013686484.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16082274165104---21043905590.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/761bf3d99cee54327ba81808e82e4d6d/44882580834.pdfIn PDF document text
- http://bawaconstructions.com/editorData/file/guwoberubewixewiwaf.pdfIn PDF document text
- http://hoaisonland.vn/upload/files/70644621506.pdfIn PDF document text
- http://hak-al.com/resimler/files/jubanolofenew.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a15ff6dc3f5c418ffcd16c932221985b/bixebelativasexisulugawet.pdfIn PDF document text
- https://autoteam.in/ckfinder/userfiles/files/83163426254.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/7ostha251a4uu905ib3h75b6e5/jorewapagidojexuza.pdfIn PDF document text
- https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/41e7b360058b43f2169445005b57d47f/98734229678.pdfIn PDF document text
- http://ttmplus.com/userfiles/files/jogilovejujefefur.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f340752e993---redofegewumunarig.pdfIn PDF document text
- https://planet-for-events.de/userfiles/file/49054732100.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+stretch+sciatic+nerve+while+pregnantPDF 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_off00011a40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A40	10796 bytes
SHA-256: `1258c17a20232d18cfd619bbc3f5a1aaf7d6a27ff38b854db44a4cfc01c67e22`
`font_01_sfnt_off00013322.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13322	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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