PDF malware analysis — malicious · 90f7f317df6e1e8a

MALICIOUS

PDF

86.8 KB Created: 2021-07-01 13:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: aeb22921136e5a0cfe01e409f04617a2 SHA-1: 760c0bf4da5dbf5392bc94c27e38afde0d41a635 SHA-256: 90f7f317df6e1e8af95f52fd4dcb2fc5bc97ec37c0eb0e69f9cb05b7ab171496

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics identified the document as a link farm, with many URLs pointing to compromised CMS upload storage or disposable hosting. These links likely serve as a lure to direct users to malicious websites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

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
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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/00173f44e6938d6ff7588a74c885247e/lepazugozeputepabu.pdf In PDF document text
- http://daismene.it/file/lirodasen.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ve01h4m9lg4v0gt52jfmvkmg43/buzowipuragabo.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608899996af9b---86875445666.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a99af9aca8c---27085019893.pdfIn PDF document text
- http://mofrantech.com/userfiles/file/28035862054.pdfIn PDF document text
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608408abe0136---xepuzimamixikidaletoruje.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d3be261b032---natubojijodaravakana.pdfIn PDF document text
- http://branpc.in/ckfinder/userfiles/files/65401249843.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6f04cae25d2f79df30a392826e06fccb/fikewesopirazijolimodule.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47b703a7c2---16287786685.pdfIn PDF document text
- http://studiotipaldo.com/userfiles/files/6122667957.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d02e145fa5---buzetijugimatevigumo.pdfIn PDF document text
- http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/kilaloxi.pdfIn PDF document text
- http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/2284068631.pdfIn PDF document text
- https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/m21aja2msfrvu4omq4l81vk6s4/99032610895.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/fde43550db465fd45dfbf24228a81b5c/83907240726.pdfIn PDF document text
- https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a947c56d32f---92732547278.pdfIn PDF document text
- http://navigator-nsk.ru/userfiles/file/56912801377.pdfIn PDF document text
- http://architects-desk.com/uploadsfile/23616317302.pdfIn PDF document text
- http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/wekezubomafokiwe.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be84cbd534c---27466363494.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f3627ad07---gekatagevegobilukaxop.pdfIn PDF document text
- https://argentinaproduct.com/ckfinder/userfiles/files/81063970627.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=a+pressure+cooker+reduces+cooking+time+becausePDF 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_off0000f0fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0FB	16540 bytes
SHA-256: `b9a350c273768778fe97743dda3462ca55b2e7c5903302590cce47560340597a`
`font_01_sfnt_off00011bcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BCC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000133e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133E3	11124 bytes
SHA-256: `a11f816689ce84291c7a6110d11055a9db3729b266e976f1101ccba915dcbc93`

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