PDF malware analysis — malicious · d89b23f89b1e9084

MALICIOUS

PDF

75.2 KB Created: 2021-09-15 17:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 32c33b2397cc817b3ffe34ac9fe467a0 SHA-1: f741ec70d27ad8cf1070e56ec6985636ea5ac757 SHA-256: d89b23f89b1e9084d65a85af945ff7ffb645903e3628827435913d2ab27bb753

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, which is a common technique for executing malicious actions within documents. The heuristics indicate this JavaScript is likely used to redirect users to external URLs, such as the one found in the document body, which are part of a link farm designed to host phishing or malware delivery pages. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. 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://nomylo.ru/uplcv?utm_term=roblox+generator+no+human+verification PDF link annotation
- https://capecoralliving.com/media/file/waperisereniv.pdfIn PDF document text
- https://www.lipca.com/ckfinder/userfiles/files/rukebogexulinesamutij.pdfIn PDF document text
- https://trainova.com/userfiles/file/bazorivedizajonevabaxewi.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328b735862f---dekegus.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130795676640---rorufupewoxi.pdfIn PDF document text
- https://rallstarawards.us/nbloom/fckuploads/file/juxulanefijorosefe.pdfIn PDF document text
- http://droprint.my/home/ququ4923/public_html/userfiles/file/21703132903.pdfIn PDF document text
- http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/zilagenodijulib.pdfIn PDF document text
- https://sukienmiennam.com/userupload/files/xokodizonenadojowudojetu.pdfIn PDF document text
- https://network-italia.com/file/rolizopivo.pdfIn PDF document text
- https://fong-cai.com/upload/files/lopoguranapep.pdfIn PDF document text
- http://baschin-heizung.de/meineBilderAlbertGrundschule/file/tevupanesupetoxubi.pdfIn PDF document text
- http://cungcapbaoduongcuanhatban.com/upload/files/rajipo.pdfIn PDF document text
- http://architettotoma.it/userfiles/files/92981130170.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f973253375---3507035773.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/38096146245.pdfIn PDF document text
- https://jackinthegym.com/uploads/files/202109060705455744.pdfIn PDF document text
- https://euchebnici.com/img/file/dotumimesopasi.pdfIn PDF document text
- http://sunil.kr/uploadfile/fckeditor/file/4443026355.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fd63adfbd---39381167534.pdfIn PDF document text
- https://mannoorpally.com/uploads/file/8558945734.pdfIn PDF document text
- http://mobilenmr.com/files/files/fonaviwepivakedomugig.pdfIn PDF document text
- https://supermovi.com/userfiles/files/27090199199.pdfIn PDF document text
- http://jaluzipro.ru/public/userfiles/file/72679122845.pdfIn PDF document text
- https://dbmotorbrokers.com/userfiles/file/muzikexiborurawifiruketit.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_off0000bf76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF76	17532 bytes
SHA-256: `a093e749cb35429029d3d30b75298afbdea8c32ed7844ac7e156e98e51492086`
`font_01_sfnt_off0000ed15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED15	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001052c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1052C	11068 bytes
SHA-256: `701faa5d796d77929e648a69e4a311eda7032c02f93d573ab87a482e4d2d1a69`

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