PDF malware analysis — malicious · f5d7222791ad54f5

MALICIOUS

PDF

93.9 KB Created: 2021-09-05 00:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: 2504faea1fb5485c76f1cb6046824f65 SHA-1: 01a155e496bb32d99edfc6a1de706371dfe7c98c SHA-256: f5d7222791ad54f537ea367ad166149b776d9652c88adabcd9f6ee8f258a9c0e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9897

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://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/deebb17129968ef5b73942efbe15ac24/kokeduxovajunuzakebe.pdf In PDF document text
- http://vodnik48.ru/content/file/5384852654.pdfIn PDF document text
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/m8dljj0i70dbnuiuajtpp0unh6/fupasuluwe.pdfIn PDF document text
- https://agrolliance.ca/ckfinder/userfiles/files/galoribejuweduzubafu.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce116f5a4aa---mukak.pdfIn PDF document text
- http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d6054e3f---finibudilopudumu.pdfIn PDF document text
- http://matsusushionline.com/uploads/files/2183200443.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f35381e2363---22190972245.pdfIn PDF document text
- https://dodomacnosti.net/data/file/wewinaloroxedadaroruzuwo.pdfIn PDF document text
- http://andreuma.madteam.net/ckfinder/userfiles/files/gidisaguleguxenufob.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f0ee31af4eabcff96d4e7f805c7e5158/povapupobumeg.pdfIn PDF document text
- https://lawina-radom.pl/files/file/73567075335.pdfIn PDF document text
- https://alajuusa.ee/media/contents/file/wazixupenowax.pdfIn PDF document text
- http://transsnabstroy.com/userfiles/file/purevos.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cdf007cf5---nedagezogegu.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/m2bg27u99o6tgsouv45ajmvqv2/59574519148.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a525958a65b---dixuduwominude.pdfIn PDF document text
- http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/59157226584.pdfIn PDF document text
- http://ezstreetautosales.com/clients/876244/File/45813867597.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/33596f7971e448a697ce9df04dc8d9bf/lujafivefevixu.pdfIn PDF document text
- https://niboparis.com/upload/fckeditor/files/33325771581.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132fef7f2f36---38238840780.pdfIn PDF document text
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a292a4e7a55ca08411d32bfca14deede/jurosumuwowiz.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/wosuvumakemifozudagimifuj.pdfIn PDF document text
- http://immobiliareborghi.com/userfiles/files/32866677353.pdfIn PDF document text
- http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608417221fc7c---37674079907.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+fix+manual+transmission+popping+out+of+gearPDF 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_off0001081f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1081F	10980 bytes
SHA-256: `7956a7508766d42b497ced6a3ff8c528e5c4ffd0b0e6cd5642db33c547394871`
`font_01_sfnt_off000121a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121A1	18152 bytes
SHA-256: `d9e51684513f11c365e5a5814a5751e9c51d1bd5f76632dc2196675383aa2194`
`font_02_sfnt_off00015134.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15134	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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