PDF malware analysis — malicious · 1456e96282ddeae8

MALICIOUS

PDF

79.8 KB Created: 2021-10-07 19:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 9be908cccf4d3b0c9c44098f7c895cfc SHA-1: cb9742a44d557507b524fb1fb0e59cd68175b605 SHA-256: 1456e96282ddeae826b7e746c561feef4b3b3a8466291bb7d6b34d6cdf8c087f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, indicating it is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, further supporting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=fortnite+how+old+is+lynx PDF link annotation
- http://inimtrento.it/userfiles/files/42944556300.pdfIn PDF document text
- https://tdemo.order-pro.com/ckfinder/userfiles/files/wodezu.pdfIn PDF document text
- http://acmemask.com/upfiles/editor/files/gunowu.pdfIn PDF document text
- http://vtaky.sk/media/file/bulifa.pdfIn PDF document text
- http://darstin.com/userfiles/files/89038566565.pdfIn PDF document text
- http://zhengfutz.com/v15/Upload/file/20219231711271670.pdfIn PDF document text
- http://koreaseowon.com/ckupload/files/10829288007.pdfIn PDF document text
- http://aromaonly1.com/yamituki-n/uploads/files/gufezawisedixuguzasovesen.pdfIn PDF document text
- https://fundoohairstyles.com/hairstyler/images/file/88748932776.pdfIn PDF document text
- https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/59016895005.pdfIn PDF document text
- http://tianlanlawyer.com/filespath/files/20211007204850.pdfIn PDF document text
- http://wx-bm.cn/upload/ckimg/files/202110031751238489.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/rijasexinodode.pdfIn PDF document text
- http://tiwtactic.com/userfiles/files/4105233247.pdfIn PDF document text
- http://www.corazondelsol.es/ckfinder/userfiles/files/konizomunod.pdfIn PDF document text
- http://dienlanhlongan.com/upload/files/savapozonuwuzu.pdfIn PDF document text
- http://share-world.tw/userfiles/file/28497849861.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16149d99686a03---37166388498.pdfIn PDF document text
- http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/42144737775.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140288b36ada---wunokoditijukiduji.pdfIn PDF document text
- https://ita.kru.ac.th/ckfinder/userfiles/files/ronewemufifi.pdfIn PDF document text
- http://hycxchina.com/filespath/files/20210907193558.pdfIn PDF document text
- https://0922.sproname.com/files/userfiles/files/nufumerikidilipar.pdfIn PDF document text
- https://dnmpaint.com/sdcc/images/file/10915520861.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_off0000d1cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1CC	18656 bytes
SHA-256: `645372a0a6b7f6a2fef046ac608f2f6a2400e4d62a0c066fcdf70ecb010c84ee`
`font_01_sfnt_off000101c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101C4	10464 bytes
SHA-256: `158f730b5cd7367be0f81a32b0ef5ec80b8760ddf0a228377e477f315b2a3505`
`font_02_sfnt_off0001197c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1197C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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