PDF malware analysis — malicious · 680624f5f6dbcb04

MALICIOUS

PDF

82.1 KB Created: 2021-09-07 20:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: 137081a7bb4a0b31578bae70891bc932 SHA-1: 49fad8e75ad18fc4d197c49f55423e1474ef152f SHA-256: 680624f5f6dbcb045b9315e4041538cd561674f331b5883dd6d349278e707e4e

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f26ab62fb6c---81957965185.pdf In PDF document text
- http://gancza.pl/userfiles/file/wixam.pdfIn PDF document text
- http://www.grupoaccs.net/ckfinder/userfiles/files/kalodavefodip.pdfIn PDF document text
- https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/843488e014d6bcbe33d178fd1d016038/15350944999.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4e036784ec5eab9319f2c16d8afa0064/nupuzijag.pdfIn PDF document text
- http://statenbracy.com/clients/d/d3/d362857cea7b6c304c7898dd6c6993b3/File/52457944342.pdfIn PDF document text
- https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/3ce579b60073b8b3793b59d27cdff1e1/33447183999.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c64276fd2b677a447c425fe6cd82c3cd/visono.pdfIn PDF document text
- http://shs1977reunion.com/clients/41590/File/2853327991.pdfIn PDF document text
- http://cokhihoangvinh.com/uploads/userfiles/file/96744715487.pdfIn PDF document text
- https://dgaspcsm.ro/ckfinder/userfiles/files/nulizas.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/f3hkisn7f8g3kvrg8clvqsimb6/wigusijusepijaradekon.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b89118b5f9c---4861128736.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d1f65fa3---vapovelo.pdfIn PDF document text
- http://diamondsnspurs.com/clients/12200/File/82277183946.pdfIn PDF document text
- http://inwama4.vn/webroot/img/files/49194790711.pdfIn PDF document text
- http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bda65e27c0a---47718090066.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/8029d5a6af30b315cb06df6f6fa6e0f3/jasepiwu.pdfIn PDF document text
- http://amghanoi.com/images/ckeditor/files/vivewidi.pdfIn PDF document text
- http://dachastyle.com/userfiles/file/66380400739.pdfIn PDF document text
- https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607307b6aaab7---zifudijujupuliwafikum.pdfIn PDF document text
- http://topimmigrationlawyer.org/ckfinder/userfiles/files/niroxanamisofikopuvu.pdfIn PDF document text
- http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607000e40e34f---9876520055.pdfIn PDF document text
- http://fgosvo.ru/files/files/kobaxasixuralilosovenuda.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/nepf9l9fp6prmed0qsn50rc7fc/pirorefakixiw.pdfIn PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6d1342f60---13926979543.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=manual+de+taller+kia+picanto+2018PDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In 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_off0000d975.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD975	11028 bytes
SHA-256: `87ed15d867361b9a07ec3613bd46d0626c97edd2aaf658753aba4c18555c7da1`
`font_01_sfnt_off0000f33e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF33E	18076 bytes
SHA-256: `7bda832804bdaad020c763bd5f4f29dc984cca6332c1d522bfbd0372d8591e1d`
`font_02_sfnt_off00012246.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12246	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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