PDF malware analysis — malicious · e68952ba4b65e5ea

MALICIOUS

PDF

83.3 KB Created: 2021-09-20 08:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 0afb8c300d6cb75bf2bc729e15f494a7 SHA-1: d9d363d178767844ac0938372361e0b6dba6acb0 SHA-256: e68952ba4b65e5ea2954f94282b110a071c6720b55c5b61cefb8dc6ad9800e4d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://crewmak.ru/uplcv?utm_term=tamil+mobile+movies+free+download PDF link annotation
- http://machulski.com/public/file/vubovilixobibixemil.pdfIn PDF document text
- http://elai.kz/upload/2021/09files/210912103538718086d7160.pdfIn PDF document text
- http://asiancfea.org/userfiles/file/67974846053.pdfIn PDF document text
- http://neoneofitou.com/ckfinder/userfiles/files/napesuwudeko.pdfIn PDF document text
- http://tdjl.com/uploadfile/file///2021091716103082.pdfIn PDF document text
- http://austria-ex.com/images/blog/file/zaluwowutonafigiwipoxuv.pdfIn PDF document text
- https://escaletravel.com/userfiles/files/zepowej.pdfIn PDF document text
- http://olsztyntransportmedyczny.pl/userfiles/file/93548231435.pdfIn PDF document text
- https://8cj2aja7-8mxb.com/contents/files/xegufepejekote.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/829564dda56b378a285e36dbabba453a/53365927243.pdfIn PDF document text
- https://u-spot.biz/js/ckfinder/userfiles/files/43525015914.pdfIn PDF document text
- https://hchoanglong.vn/userfiles/file/96978811676.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/bc2080531b67d1c652280da93e535510/wofapoxa.pdfIn PDF document text
- http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24895777557.pdfIn PDF document text
- http://scro.ru/pic/file/68416051149.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146babda5e74---35860306274.pdfIn PDF document text
- http://srtprogetti.eu/userfiles/files/nesuboratejanu.pdfIn PDF document text
- https://burragebrothers.com/demo/jolie/beta/userfiles/files/19605292838.pdfIn PDF document text
- http://urbanelect.com/userfiles/file/tizupina.pdfIn PDF document text
- https://bodymart.in/ckfinder/userfiles/files/93949819771.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131bf5013647---14316792210.pdfIn PDF document text
- https://garnizone.com/userfiles/file/nosujeko.pdfIn PDF document text
- http://sictombbi.fr/ckfinder/userfiles/files/37839412520.pdfIn PDF document text
- https://cmflower-kkc.com/ckfinder/userfiles/files/60350308055.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_off0000e207.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE207	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fa19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA19	17236 bytes
SHA-256: `9990af3aca3ab26454d740f9bc9fa12cf9121344da81c0af754e9e487fab4049`
`font_02_sfnt_off000126fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126FD	10672 bytes
SHA-256: `11d2214c9870b289762ce7db9c997a29c71bf0d5348b777e76ea171ae7e5f6bb`

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