PDF malware analysis — malicious · f79f4cd76c22e519

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 14:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 099e9a364732293f508d91b0260add5e SHA-1: 02593a1a08fe9328484b26a9ebeca52733ee4aec SHA-256: f79f4cd76c22e5192c435808cd4a3fb1396a2f976311f24c65403181e4310271

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content. The presence of embedded JavaScript points to potential execution of malicious code.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. 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://hotnewsmd.deca.md/upload/userfiles/files/607334124.pdf In PDF document text
- http://logenamerica.com/userfiles/file/wabatudijaza.pdfIn PDF document text
- https://santa.my/images/users/00000000/files/69722995814.pdfIn PDF document text
- http://flex-link.cn/uploadfiles/files/salakiletigudexovadumuwi.pdfIn PDF document text
- http://shesob.com/file/files/24904145920.pdfIn PDF document text
- https://nodka.eu/ckeditor/ckfinder/userfiles/files/ririgawuvoge.pdfIn PDF document text
- http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/22549645927.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396167b5135---31603732415.pdfIn PDF document text
- https://fleuriste79.fr/ckfinder/userfiles/files/joneguri.pdfIn PDF document text
- http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dawapomovexejatasapomof.pdfIn PDF document text
- http://harekatmemuru.com/images/Media/files/60164560947.pdfIn PDF document text
- http://flyingwedge.com/uploads/assets/file/xevudabifotap.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139131cb6627---52197082479.pdfIn PDF document text
- http://italianopizzeria-pg.com/uploads/files/gepovolo.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/malum.pdfIn PDF document text
- http://fullcolorspandoeken.nl/userfiles/file/93391061405.pdfIn PDF document text
- http://www.moyekolodin.com/files/87231042921.pdfIn PDF document text
- https://marljivo.hr/userfiles/file/90569353649.pdfIn PDF document text
- https://encoyun.com/calisma2/files/uploads/21135491424.pdfIn PDF document text
- https://khachsan295doson.vn/namthuan/images/news/files/fekorelujofikikodawamego.pdfIn PDF document text
- https://tybistanbul.org/resimler/files/wetuxalabijoferow.pdfIn PDF document text
- http://stellarp.com/userfiles/file/88290849426.pdfIn PDF document text
- http://whatifitspossible.com/ckfinder/userfiles/files/60322823856.pdfIn PDF document text
- https://codefon.hu/js/ckfinder/userfiles/files/sejasuxopajiwazozunozu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=lucky+patcher+for+android+10PDF 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_off0000dd09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD09	18608 bytes
SHA-256: `89e95752c5534b18ddc852a042a6f9866838e7306b54771d86e4593f2df7ed20`
`font_01_sfnt_off00010dcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DCC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000125e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125E3	10940 bytes
SHA-256: `c060105f6ff1236a171c868efc2cf68f85fc83031e15d322a67b9abda63e9f08`

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