PDF malware analysis — malicious · cb91b50243c14588

MALICIOUS

PDF

84.9 KB Created: 2021-08-15 05:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: e011f7705286df22835681abeaaeee9e SHA-1: 0dec309230ac98daefe416ff29bebd95654f213b SHA-256: cb91b50243c1458872d56d8db912d06b487d79dad6f6c5ae74aec4ba9cf3c040

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a lure to install a browser extension or update, a common social-engineering tactic. The document also hosts a link farm pointing to multiple compromised websites, likely for distributing further malicious content or for SEO poisoning.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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
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 https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/c8fb2391018fd3dd509052b851687f5b/pafamifalusorikaxamem.pdf In PDF document text
- http://salespate.com/userfiles/file/16881120228.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbef178d6d---99637945280.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099f06c221b8---bisizoridadivitun.pdfIn PDF document text
- http://zoltysnieg.pl/pliki_wyswig/files/rudafadumezu.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081a1f950a6f---5188468552.pdfIn PDF document text
- http://stressmanagement-karriere.de/userfiles/file/nupukusibelamosajep.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/10daa36bafffca5dcbff9ba3c5d25d71/bajakejulovijomapajutug.pdfIn PDF document text
- https://baigiangtoanhoc.com/upload/files/96828207745.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b873c5aa65875731a11ad4ba21b66258/jenoredojalupizuxaposopo.pdfIn PDF document text
- http://cec-intl.ru/app/webroot/files/file/zuzanasiwopepaxiwixuv.pdfIn PDF document text
- https://termoformat.md/img/files/nurotuwilovalobikuzujex.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2f742eff31d0aecbe72a81ef50525a50/57993536285.pdfIn PDF document text
- http://fipjp.com/userfiles/file/gorerilewanolalizutulik.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1e492ebfe---wesixap.pdfIn PDF document text
- https://hometeamcorp.com/images/usr/50086091320.pdfIn PDF document text
- http://burelomdo.com/ckfinder/userfiles/files/79530881265.pdfIn PDF document text
- http://firmen-bekleidung.at/userfiles/file/gamela.pdfIn PDF document text
- http://anhuizhkj.com/upload_fck/file/2021-7-13/20210713182105361829.pdfIn PDF document text
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f902a84fdb---vinogerupazofokegutulaga.pdfIn PDF document text
- http://ithaca1961.com/clients/875375/File/7568269894.pdfIn PDF document text
- http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/kkm0sph45tv8ov33rp95louaqi/tinugewigawu.pdfIn PDF document text
- http://businessvaluationapp.com//fck_files/file/71005518370.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c056d3683---3706739437.pdfIn PDF document text
- http://qianlong99.org/ckfinder/userfiles/files/metologofudowowevaler.pdfIn PDF document text
- http://wittlich-luexem.de/userfiles/file/53876257529.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd69c89733---41395367939.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=english+grammar+101+worksheets+pdfPDF 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_off0000e465.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE465	17744 bytes
SHA-256: `3f00abd8ef1ee10454bf93e09655b5d66b7439a5eb945873f3da30d63b90a626`
`font_01_sfnt_off00011274.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11274	11280 bytes
SHA-256: `a2706b5415573d3522028a9374b40410d0cc56f05e685a6fdd0294767bc31833`
`font_02_sfnt_off00012c99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C99	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.