PDF malware analysis — malicious · 484c1478c1e97d23

MALICIOUS

PDF

80.0 KB Created: 2021-09-11 08:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 218e9a5d449440f578c1a8ac4693b191 SHA-1: 3ea26dc5890837ce996e255e08816ed214c634b9 SHA-256: 484c1478c1e97d23cf13aca08eeb49e4fde9612779a54072e308bb7b71eb7cc8

164 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript that triggers external URI actions, redirecting to a variety of compromised or disposable hosting sites. These sites appear to host further PDF documents, suggesting a chain of redirects intended to obscure the ultimate malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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 http://agapetown.net/ckfinder/userfiles/files/50495351389.pdf In PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135141d2f6d7---simesoviwoguminopuse.pdfIn PDF document text
- http://solemarservizi.it/userfiles/files/vaxopoxunege.pdfIn PDF document text
- https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/dadepevafugodofit.pdfIn PDF document text
- https://narellesastro.com/userfiles/files/luzurovafej.pdfIn PDF document text
- http://bangdientunhk.com/upload/files/80631517381.pdfIn PDF document text
- https://used-machinetools.ro/app/webroot/files/userfiles/files/pokiridikidakipi.pdfIn PDF document text
- https://mn-lawfirm.com/box/userfiles/file/81902560523.pdfIn PDF document text
- http://prosefkuchare.cz/userfiles/divejavimosano.pdfIn PDF document text
- http://diamant-x.sk/UserFiles/file/5751552961.pdfIn PDF document text
- https://nationalshield-uae.com/userfiles/files/jevugilaf.pdfIn PDF document text
- http://geodeslaboratori.eu/userfiles/files/35720200363.pdfIn PDF document text
- https://beyondpins.com/calisma2/files/uploads/43302646420.pdfIn PDF document text
- https://nepalonlineexam.tisaracademy.com/userfiles/files/zonazekavazalopetasuzop.pdfIn PDF document text
- https://ibrahimkoc.com/images/Media/files/69662451823.pdfIn PDF document text
- http://maszyny.pl/userfiles/file/70894480133.pdfIn PDF document text
- http://easyliveconstruction.com/ci/userfiles/files/17862731622.pdfIn PDF document text
- http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/raluzepizebitabo.pdfIn PDF document text
- https://halkum.rs/files/83117338645.pdfIn PDF document text
- http://cmtdental.com/upload/ckimg/files/71273441276.pdfIn PDF document text
- http://slbreakingnews.com/ckfinder/userfiles/files/19601987594.pdfIn PDF document text
- http://blgjad.com/upload/files/sazusofekoxozinoluve.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161379b29303a8---57443705413.pdfIn PDF document text
- https://newshieldinsurance.com/demo/gsa/final/images/file/vevogoferavezamuz.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131ce31b3ece---lozivumiz.pdfIn PDF document text
- http://ekogamma.pl/javascript/ckfinder/userfiles/files/51208935889.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sky+filter+apk+downloadPDF 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_off0000cbf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBF4	20708 bytes
SHA-256: `ae5af5dde3056cd265cccae979215db35c4037fa0a4490ce4487af8c935b756e`
`font_01_sfnt_off0001018d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1018D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000119a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119A4	10688 bytes
SHA-256: `08a9bcfa7a5753e263cd63e501fef84afbb9da7ddd57ba7f1463342493854317`

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