PDF malware analysis — malicious · 710f9c7203d924ba

MALICIOUS

PDF

79.7 KB Created: 2021-09-22 15:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: df965c9bf1c149a57930e703c96e5f65 SHA-1: e54a749382058898595f29307688828ca5e002da SHA-256: 710f9c7203d924ba04f5ea14a50da3c4a037ac33f8626a1e31bb58953b636956

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 http://4998horo.gmmwireless.com/contents/files/32118111742.pdf In PDF document text
- http://luligang.com/ckfinder/userfiles/files/xedowoxizodebilo.pdfIn PDF document text
- https://lifecareproduct.in/ckfinder/userfiles/files/40344116329.pdfIn PDF document text
- https://dialogueinpraxis.net/files/docs/75333753423.pdfIn PDF document text
- http://www.barbazan-debat.fr/ckfinder/userfiles/files/35507669956.pdfIn PDF document text
- http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/77585035496.pdfIn PDF document text
- https://newegys.egyseg.eu/ckfinder/userfiles/files/88865233096.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd0fcb43aa---37891710828.pdfIn PDF document text
- http://fijiembajak.com/uploads/ck_uploads/files/bavilo.pdfIn PDF document text
- http://www.huntsvillepr.com/files/files/92619272114.pdfIn PDF document text
- http://portalcom-b2b.es/img/user//file/_0892429001631224030.pdfIn PDF document text
- http://k3projekt.pl/uploads/userfiles/files/kesazamobugajosujon.pdfIn PDF document text
- http://dalieuht.com/app/webroot/uploads/files/98024399930.pdfIn PDF document text
- https://pointswestliving.com/ckfinder/userfiles/files/wifazoga.pdfIn PDF document text
- https://vaitinhdien.com/app/webroot/upload/files/42196843828.pdfIn PDF document text
- http://tlumacz-lipno.pl/pdrzewiecki/files/vekifobufofizi.pdfIn PDF document text
- https://lederstuhl-shop.de/ckfinder/userfiles/files/supipofopivafonerepagute.pdfIn PDF document text
- http://dolekkoyum.com/admin/UserFiles/file/17850325325.pdfIn PDF document text
- http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161366f2500a3a---jewesofoletol.pdfIn PDF document text
- http://sushiloverca.com/uploads/files/murufitelobotafo.pdfIn PDF document text
- https://www.jdconstinc.com/ckfinder/userfiles/files/29825462249.pdfIn PDF document text
- http://studiopassarotti.it/userfiles/files/25903165164.pdfIn PDF document text
- https://bahia-group.com/ckfinder/userfiles/files/xowizokijelen.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=apk+editor+pro+all+versionPDF 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_off0000d229.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD229	10524 bytes
SHA-256: `8d46763d8a77629380e905520415ca085ef0999e0e1b920ff8ebe483e6c6f6eb`
`font_01_sfnt_off0000ea46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA46	17740 bytes
SHA-256: `83d96d2c11282efb33b74f449cd138e827870b17d2d2d231680ef155a194f041`
`font_02_sfnt_off000118d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118D5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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