PDF malware analysis — malicious · af6a49fc2bbdc46a

MALICIOUS

PDF

110.4 KB Created: 2021-07-02 08:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 8022127b88dc09a7e55a32915e6e2e78 SHA-1: 86681bee0d4b40ebe77cf740da4f802bf820d0be SHA-256: af6a49fc2bbdc46a522f178b9b79a96146de986f059a0951463da96877c09221

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9780

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://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/7bc926ff814ed28c29a36391aad544d3/79596446577.pdf In PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/dcc901f854075ae446a6b48fefb60384/nefowazugugalevevig.pdfIn PDF document text
- https://mystruggle.uk/indigo/ckfinder/userfiles/files/9662268295.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160919b1ec9c35---61222184243.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/file/diganujamatexomoj.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e9a91081502f0a797da2c0ac0f78c56b/94150801226.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a7fc27ea3---43803936145.pdfIn PDF document text
- http://videofilm-tv.ru/content/File/fitavagixaser.pdfIn PDF document text
- http://boathousebrokerage.com/userfiles/file/37512706323.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab71de2b609---10233433512.pdfIn PDF document text
- https://mszukam.pl/dat//file/nagetisamesulasegusase.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c974378f3eb---jexepivegotonabuv.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609883a2b1665---13126949772.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/u46dn6s8fjg06ncl63jicei8l2/zemixujadoposa.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160818292ac522---jimaxupapopevitufalizu.pdfIn PDF document text
- http://hb1004.com/userData/board/file/bezugowujuputurexujaforex.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a01d0c229e---27909112899.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/b8813c53f83e5d1e4e13869dd7a41c13/23553038818.pdfIn PDF document text
- http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160783a5dac42b---fakupowidaril.pdfIn PDF document text
- https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/17a4b4b4ff085b639116e898a5df6887/84836524382.pdfIn PDF document text
- http://beiwendq.com//data/attachment/file/navenopoxote.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//97213117281.pdfIn PDF document text
- http://wsp.pl/userfiles/file/87325857812.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160714491bcb4c---gavam.pdfIn PDF document text
- http://crackershrimp.com/file_media/file_image/file/vodapexu.pdfIn PDF document text
- http://musikpark-live.de/userfiles/file/6018084380.pdfIn PDF document text
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/kg0q4lj0mu0lr54rpkvmj4g1iv/56358000055.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c853f9a51ae---20430274332.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=reduction+of+ketone+to+secondary+alcoholPDF 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_off000149af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x149AF	18404 bytes
SHA-256: `498da8d593569ddb41321b80551fc2882e0c8eaf1dc70a40ca25138a626816e2`
`font_01_sfnt_off00017a42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17A42	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00019259.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19259	10924 bytes
SHA-256: `823cb9ddcf7fbb7997c5b6102a4cb4a6c96c76e63e0a1dd82eb3bc309a4c2fc4`

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