PDF malware analysis — malicious · 8f4dd34a91e47f09

MALICIOUS

PDF

85.8 KB Created: 2021-08-29 00:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 6f02d6eb0bc61823d2adb11ec9b66bbc SHA-1: 0ee8e4c0842962026b7d293a039fe0f24018a620 SHA-256: 8f4dd34a91e47f099a02b3acbd2dd35d5ce3e262bba08ef24b0edded3dde3441

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft' plugin's file upload directory. These links are likely used to host malicious content or redirect users to phishing pages. The PDF structure itself appears to be a link farm designed to obscure the final malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833cfb5eb25---dimopuxume.pdf In PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071c19757605---bewoninunuxu.pdfIn PDF document text
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611562bef1690---vabufobabisoxokij.pdfIn PDF document text
- https://topinsolventa.ro/userfiles/file/gogaze.pdfIn PDF document text
- https://foulardfotografando.it/file/59217808326.pdfIn PDF document text
- http://surtek.biz/image/files/20150303_073621.pdfIn PDF document text
- http://dokturmice.com/ckfinder/userfiles/files/xurolonosamewurawed.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/2628b225e9187c2809574aff840dc039/38012284494.pdfIn PDF document text
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/5a49517af5b074740764b6aea16976d2/16664401656.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0bdcd7ec8---sejiso.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e7220b6b3f24e0a0c4d8ae854b322cb7/28878249047.pdfIn PDF document text
- https://benqmusicworkshop.com/fupload/file/fisibezuw.pdfIn PDF document text
- http://fsnmmaterials.com/UPFILE/userfiles/files/xarewetekuxazezekiwowek.pdfIn PDF document text
- https://giverny-bkk.com/upload/files/zejajujap.pdfIn PDF document text
- https://fsbulletsandbrass.com/userfiles/files/molokonarusofijorozu.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1c0c2074d52cf8ee8170ffcab3b3b059/wowubo.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/xesepiwize.pdfIn PDF document text
- http://seyrimerdin.com/userfiles/file/nokatevokoluluxuxofefa.pdfIn PDF document text
- http://pantryscan.com/123cars/imagefck/file/20804596800.pdfIn PDF document text
- https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/tribhmtg1bd86nepv5uqdokruq/22007517109.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c466624ebfff06f75488c0ebbfcc76ba/xajanexalebekitufe.pdfIn PDF document text
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ol5dh2l65jr70sutufqs0dket6/xuvibasalivazivujobedore.pdfIn PDF document text
- https://kasihpaham.com/contents//files/10831115052.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc642b1cb0---89301068644.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/80245036344.pdfIn PDF document text
- https://nomortiga.com/contents//files/bawadoditopufoliwadarabep.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=anterior+to+posterior+tear+of+superior+glenoid+labrumPDF link annotation
- http://s292376414.onlinehome.fr/datas/imgmail/file/18371232067.pdfIn PDF document text
- 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_off0000e95e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE95E	16924 bytes
SHA-256: `0b3686c05638cba25195027c9eb2d6f9580fa9a3bac9e0522daf56f2a5e2b7d6`
`font_01_sfnt_off00011546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11546	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012d5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D5D	11060 bytes
SHA-256: `bcff3af655a3b13df7e0e974ace8487b48df6f1ba2ee701f7c9b8cd8275e7ac2`

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