PDF malware analysis — malicious · bdd8219a9ffcc8dc

MALICIOUS

PDF

81.4 KB Created: 2021-10-16 20:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: e9698899e7fde2d31c7f58bb47ba156a SHA-1: 173d7bb6e40ef6ebd1e02055d88b3bf887417ee2 SHA-256: bdd8219a9ffcc8dc6e2bda565839b9a10b352b84899c515ca30abcc670a3d4f9

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. The presence of a 'Password-protected archive handoff' heuristic indicates it's likely a lure to obtain a password for a separate malicious archive. Numerous URLs pointing to compromised CMS uploads and link farms suggest a distribution mechanism for further payloads. No scripts were extracted, but the overall structure and heuristics point to a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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 http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613979bd48d90---34458619836.pdf In PDF document text
- http://brcassociati.com/userfiles/files/62038080725.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16168b26e0c96d---51259669145.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614677e790364---4507972467.pdfIn PDF document text
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0ea8b2d21b553cc52befe9862eb9536e/753272870.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/2942d8d89319e55fceee552a3eb51185/kobomajutifunakojekajokum.pdfIn PDF document text
- https://vanrun-it.nl/userfiles/files/bumusadalodin.pdfIn PDF document text
- http://hillsdalehorseboarding.com/ckfinder/userfiles/files/vizowatilidad.pdfIn PDF document text
- http://thegioicamdo.com/upload/files/70492122493.pdfIn PDF document text
- http://pravkniga.ru/files/userfiles/files/13415847884.pdfIn PDF document text
- https://aljazeerahdrilling.com/userfiles/files/1302791852.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/80f065ef643a7af076f96a12dc6de184/46533422009.pdfIn PDF document text
- https://chingchia.com/uploads/files/202110110850085394.pdfIn PDF document text
- http://littlepearlspublishing.in/data/eimages/file/gaxokupi.pdfIn PDF document text
- http://fohow77.ru/upload/file/titukamimamegepegalizi.pdfIn PDF document text
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/135affa86b0b086a42a00834cb723680/25059360913.pdfIn PDF document text
- http://fernandopelosini.it/userfiles/files/galubo.pdfIn PDF document text
- https://virker-ikke.dk/files/66329925076.pdfIn PDF document text
- http://dkkarsin.pl/img/upload/files/70495424567.pdfIn PDF document text
- http://motocams.cz/ckfinder/userfiles/files/6100079156.pdfIn PDF document text
- http://hkwwta.org/userfiles/84868518933.pdfIn PDF document text
- https://madame-tina.com/ckfinder/userfiles/files/demojojim.pdfIn PDF document text
- http://acril.ru/ufiles/files/33087899558.pdfIn PDF document text
- http://solarhomepage.ch/fckeditor/editor/images/file/puvokojudopafus.pdfIn PDF document text
- https://nabijdefossa.nl/upload/files/dubaxujon.pdfIn PDF document text
- http://facyt.com.ar/ckfinder/userfiles/files/tizuxonafixezogiw.pdfIn PDF document text
- https://ctapigroup3.com/contents/files/kitigekejoguluvejaror.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/u-9XGpgKpwY/uplcv?utm_term=pdf+image+to+word+text+converter+free+onlinePDF 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_off0000d95c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD95C	10904 bytes
SHA-256: `c11029f9902451575ff323d487826ad70037862420f7c310ac275eeac32e5eed`
`font_01_sfnt_off0000f274.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF274	17640 bytes
SHA-256: `b328de98b5b90427e25a371da36c008fa04a4fba45263ef9520d6ca1e4df7fd1`
`font_02_sfnt_off00011f2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F2E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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