PDF malware analysis — malicious · eb5978760020c676

MALICIOUS

PDF

73.4 KB Created: 2021-07-04 04:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 6783b5200e7b31e6310a88328d7e03f3 SHA-1: 063f41ddb781c3e955d5f7c725702b865a702242 SHA-256: eb5978760020c676b209159b38a4b6956e892d5feea562570232bfd92a35a0fb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160767b068273d---7290090966.pdf In PDF document text
- https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/0cc009b5e5af6f4561bbee1f18ba93a0/50707882343.pdfIn PDF document text
- http://i-daa-wl.de/userfiles/7197827525.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdf14b290e---risovudulujimijiruwujo.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4a92b83b5---54346237274.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160749fbe4dbb3---gunuxugel.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9be78a57a---69912424452.pdfIn PDF document text
- https://oglethorpeclub.org/~oglethor/UserFiles/file/sojemawelukavaxuxam.pdfIn PDF document text
- http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac08c6ea74b---83397662729.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f656c095c---xuseki.pdfIn PDF document text
- https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/1c3104a0a027bc06f1fe7ebf0ccc807d/jizejujim.pdfIn PDF document text
- https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef1fdc5e5---xonokasuwizi.pdfIn PDF document text
- http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/matusivoleganiges.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a95bd4d93f8---15474978610.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c741e6515de---dixuwajenaporevo.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/ec72dfa955f322d681ea45f4fba85c25/85050680382.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/dtc02dvclksrmm2oj4ba9bk2a1/11611136333.pdfIn PDF document text
- https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/cffe6610365c5ef95c85f713c3421cbd/mobevexeterixo.pdfIn PDF document text
- http://campingwithconvenience.com/files/files/jekizibege.pdfIn PDF document text
- http://baodieptailor.com/uploads/2021-07-02/images/files/lifalazevuguzumu.pdfIn PDF document text
- http://kompletucetnictvi.cz/files/file/zoraka.pdfIn PDF document text
- https://seedomoretravel.com/files/files/bujamunamirazizugaz.pdfIn PDF document text
- http://dishandspoonproductions.com/ckfinder/userfiles/files/pirudoxipipetiduwuk.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/61e7437529e6fc857e5e58f68eedb1ef/6361360419.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=hinder+go+home+get+stonedPDF 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_off0000bd74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD74	10480 bytes
SHA-256: `2af4d3f0b6a428eb8d12abfe0b804bcdcb2458326421eca3f68c31d25a95c800`
`font_01_sfnt_off0000d4c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4C4	16088 bytes
SHA-256: `4ea4da8222fe1de8a5169a150997cb53349acf20814039c4aee15dc7c21977be`
`font_02_sfnt_off0000fec8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEC8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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