PDF malware analysis — malicious · 14e127d36bd18873

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 10:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 4a120b542909019ea03891a314f9a6eb SHA-1: e9e7d374ac53a94b7421eccac2e104b0ee6533bb SHA-256: 14e127d36bd18873e53f675b60ca30f889b99fe6c3cd3ceb2cb4eca748cca7c5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and embedded URLs align with techniques used to lure users to external malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9925

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://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s27je8it5d5inkrkb0ccbm9210/riwavuvu.pdf In PDF document text
- http://agecarekorea.com/ckupload/files/puramejafobiseg.pdfIn PDF document text
- http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/zogetamivegamujafaxave.pdfIn PDF document text
- http://e2ingenieros.com/ckfinder/userfiles/files/96508778349.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2560740bf088df54a55b3a2cd04f2f93/90322849474.pdfIn PDF document text
- http://kovospm.cz/fotky/file/nibiporo.pdfIn PDF document text
- https://gulceoyunlar.com/calisma2/files/uploads/4281270063.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142f6d71a248---27090722118.pdfIn PDF document text
- http://uniroll.pl/user_images/file/40213278512.pdfIn PDF document text
- http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xavipenutugezikesudam.pdfIn PDF document text
- http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a356529760215c8505f0b86a6528e7f9/zevowovigumotunepiwo.pdfIn PDF document text
- http://banner-ever.com/ckImg/files/8198161453.pdfIn PDF document text
- http://vimar.ua/userfiles/files/rakufojixebikejomexogarux.pdfIn PDF document text
- http://kondicionery-domodedovo.ru/upload_picture/file/pugiko.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304903e45f3---55652112484.pdfIn PDF document text
- http://sungwoneng.com/upfile_editor/2021/files/fowopofunu.pdfIn PDF document text
- http://ergo-logo-bamberg.de/userfiles/file/bebevupasegumutusomoku.pdfIn PDF document text
- https://digireg.se/upload/rowil.pdfIn PDF document text
- http://cokhihoangvinh.com/uploads/userfiles/file/jutokapiwirutek.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161352f9393b27---84892039410.pdfIn PDF document text
- http://dzirerealtors.com/uploads/4662233321.pdfIn PDF document text
- http://srtprogetti.eu/userfiles/files/79009678529.pdfIn PDF document text
- http://galettedesrois.eu/userfiles/file/fopabosamizaxoratovazitek.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mortal+kombat+movie+2021+2PDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00010b1f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x10B1F	16888 bytes
SHA-256: `65ec3de44c6767b8e65203987ef3fdcb051680f0a6e754af9a448a5e13c569ec`
`font_00_sfnt_off0000c544.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC544	10580 bytes
SHA-256: `33e0e311422416fb2985358b28d84319d87f573307ca227e8cc90b939c93dde4`
`font_01_sfnt_off0000dd8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD8C	17760 bytes
SHA-256: `9aca3c7f49a57c25b53ab318ac1b05fac49ccb2fa7cc9bff425e631f6fd76dc8`
`font_03_sfnt_off0001238f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1238F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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