PDF malware analysis — malicious · 2671b4d9c8c179b8

MALICIOUS

PDF

89.8 KB Created: 2021-08-01 20:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 26c47ead320e89d972de3b606173ff6c SHA-1: 4ac05fe838274444692a4fd9258adb12e8b52fec SHA-256: 2671b4d9c8c179b819d0be9451a6ed29c96a9972c944bf69bef323e4a5a7832d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings suggest it's designed to lead users to potentially harmful content. No scripts were extracted, but the sheer volume of suspicious URLs points to a malicious intent to redirect users.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

Heuristics 5

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://ketchas.ru/uplcv?utm_term=how+to+put+together+my+swiffer+wet+jet PDF link annotation
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3vbahgv83vmdo29kgtmr7u2h31/mafepobimizibovunigubes.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca81c08e00---45007164433.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/81hppr2cmhj9u6r0rkph7jgcg0/15890549679.pdfIn PDF document text
- http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/lokunidasexo.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea924463dd---65643900812.pdfIn PDF document text
- http://www.allatpatikapecs.hu/images/file/sagesurojidimusew.pdfIn PDF document text
- http://taikenplan.jp/ckfinder/userfiles/files/10275576124.pdfIn PDF document text
- http://sartoriaventurini.com/userfiles/files/44426934210.pdfIn PDF document text
- http://vtdsbinhthuan.vn/public/uploads/userfiles/file/bisesekuniwa.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609634ba3a557---648232267.pdfIn PDF document text
- https://aplusadvance.com/naver_editor/data/file/panejudojofuluzorekolomom.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609df00b311eb---99519161451.pdfIn PDF document text
- http://win-sonic.com/kida2018/ck_imgs/files/pusamanemexupasaman.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/888614c4d665686319a88acb754cfc24/20756916210.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ad6b40f79---98990584470.pdfIn PDF document text
- http://skogsformedling.se/bilder_umeny/File/gisosotuguzowidebigeputu.pdfIn PDF document text
- https://upbfassadenbau.com/upload/file/96676167384.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fd811bae872a9e4b98be8d28955f8809/12634124078.pdfIn PDF document text
- http://mai-colle.jp/userfiles/file/duzedi.pdfIn PDF document text
- http://otelm4b.ru/admin/ckfinder/userfiles/files/56256498080.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/vufejanobemuwanebana.pdfIn PDF document text
- http://kapsalonvogue.nl/files/file/1720755849.pdfIn PDF document text
- https://kermiradiatoriai.lt/images/files/vavewaraboduf.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160858f17a40a6---sobodenafijelilumik.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_off0000f65d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF65D	10916 bytes
SHA-256: `23d95343f3f5ebadd8bda68f9e70cf022d83ebd91c0a893a57466dbfb837cdcc`
`font_01_sfnt_off00010fac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FAC	18440 bytes
SHA-256: `6e5ba1aa5972c3fb345cb3de5e33f641a6a3cd4bee982725e889564aee47d7a6`
`font_02_sfnt_off00014069.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14069	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.