PDF malware analysis — malicious · bae3e210449302f6

MALICIOUS

PDF

76.3 KB Created: 2021-09-08 05:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: be80c1fba9f74078ac06e4463c7fda1c SHA-1: c43a1ec0434fe7be237a0148a44d64c4be479138 SHA-256: bae3e210449302f6f0b013e2eed946beaa30380afb279853eafdae4bc3b24763

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. The file's structure and numerous external links align with techniques used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://nomylo.ru/uplcv?utm_term=organisation+of+root+apical+meristem+pdf PDF link annotation
- https://happyjourney.webtrails.in/ckfinder/userfiles/files/50745676479.pdfIn PDF document text
- http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17957791422.pdfIn PDF document text
- http://morard-mcf.fr/data/Files/munebimanafemitexuwasu.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/86cqvhg4s49bcsrrjapnhlugqt/1409658510.pdfIn PDF document text
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/34a4458f2c1a0dd47998ae63c7741a19/3394137287.pdfIn PDF document text
- http://www.bash.cl/media/file/dasizuselariniselopun.pdfIn PDF document text
- http://aroma--style.net/files/files/kexumutuzirizoranuj.pdfIn PDF document text
- http://ceskylakros.cz/userfiles/file/6239775493.pdfIn PDF document text
- http://orthodoxnews.us/file/97434594392.pdfIn PDF document text
- https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608986e2d0c81---taromanukab.pdfIn PDF document text
- http://jump360.co/upload/files/20210616081358.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/1f325b6d142171f14e83f18115b56f6b/63669936496.pdfIn PDF document text
- http://tecs4.com/intranet/ckfinder/userfiles/files/46355436554.pdfIn PDF document text
- https://walkandsmile.com/userfiles/file/gafefarataxasebasow.pdfIn PDF document text
- https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/0510ec17f0b24ab51cd8059ec9e83511/ropagoxawirigaromof.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daa7abb2300---tiwowi.pdfIn PDF document text
- https://wct.goldcrownresort.com/magazine_files/files/noxida.pdfIn PDF document text
- https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/99bbe3d70ebab20d35db4f64f565b443/58251188709.pdfIn PDF document text
- http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608358c188e37---sotosufasubup.pdfIn PDF document text
- http://degeninhotel.ru/admin/ckfinder/userfiles/files/48241661341.pdfIn PDF document text
- http://rhondachem.com/d/files/33726466412.pdfIn PDF document text
- https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/db8d32a45afa1379cc7cbb650d1cda37/doganiwegopazon.pdfIn PDF document text
- https://exlite.it/ckfinder/userfiles/files/16072886011.pdfIn PDF document text
- https://aquarell.ro/userfiles/file/nuxuroledoxip.pdfIn PDF document text
- http://whalesart.com/uploadfile/file///2021062216485775.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/52asgpht7vtusqk3tflou87g5b/49868984465.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_off0000c87b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC87B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e092.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE092	10988 bytes
SHA-256: `c8439f6ddc0e8c03e7c24433a8ba0c7c746626a11cb6a1e07d5d21beec78c0ce`
`font_02_sfnt_off0000f9e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9E5	16312 bytes
SHA-256: `169161c0a77fe38b301623a033b7db449246a91e85af7309590606ba2850df34`

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