PDF malware analysis — malicious · 945897b02e04525d

MALICIOUS

PDF

91.3 KB Created: 2021-09-04 23:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 06ff01843fa2ec8e09f1b89944fa2627 SHA-1: 18428bbe70851769607bc099feb409301c9b98f7 SHA-256: 945897b02e04525d02ee9ca3b74dd948d7dd5adb4dbc4ac0a117e2de89b9bf31

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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 http://gloria-eurex.com/images/blog//file/10058304698.pdf In PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ng37k9tq0bdooif2ssnmf6nhmn/lidiw.pdfIn PDF document text
- https://genegurumiraclehealer.com/userfiles/file/tajuker.pdfIn PDF document text
- http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/87041379089.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/naub9lbmei40d87398eho4tbfh/9814001509.pdfIn PDF document text
- http://epicridesnepal.com/files/35964435102.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/08959a2c22658c0db4deb2675d6cfb73/tofinesipewuzudotiped.pdfIn PDF document text
- http://ikkosushi.com/uploads/files/rebabesuwovopenob.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611633da8625e---vagavogolip.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3a68c72f1---92970729736.pdfIn PDF document text
- https://hglobaltourb2c.com/FileData/ckfinder/files/20210803_506A5EA8F1D274F5.pdfIn PDF document text
- https://thepainter.asia/upload/files/samopazujoxetavatemuj.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca65cbb221---sarojigelulomakazibofiko.pdfIn PDF document text
- https://www.elshandmadedesign.nl/ckfinder/userfiles/files/58534592118.pdfIn PDF document text
- https://iringmalaysia.com/ckfinder/userfiles/files/51263914768.pdfIn PDF document text
- http://3colorjazz.com/fckeditor/userfiles/image/migonejematovilitivelive.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/97pakahh15tjav11e74q5dffse/dujagewo.pdfIn PDF document text
- http://alexhoffordphotography.com/temp/files/file/17786008275.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a3a9408495---21580950716.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b882c0c7ba2---tesit.pdfIn PDF document text
- http://olguanaokulu.com/upload/file/51285670442.pdfIn PDF document text
- http://hum-lucknow.org/test/fckeditor/file/duvokafajinev.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1866f4c043---48675207.pdfIn PDF document text
- http://malir-naterac.info/UserFiles/File/83299896104.pdfIn PDF document text
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d49a155f202899e410f167cdfc45deeb/8595901566.pdfIn PDF document text
- http://zonwering-belgie.com/ckfinder/userfiles/files/jugimeda.pdfIn PDF document text
- http://ilovegabal.net/fckeditor/_upload/file/naxuroluja.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cours+complet+de+graphisme+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_off0000fc77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC77	11092 bytes
SHA-256: `7e7439f503a8989995a69d751e69a9075deba132842eb0a7f64ebb5fe28ab357`
`font_01_sfnt_off00011628.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11628	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012e3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E3A	19560 bytes
SHA-256: `5933039cc41443323cbd374d06cfd55c4b678b8695dda7793c6fd2263e8817c4`

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