PDF malware analysis — malicious · 1ee3e71036ba5375

MALICIOUS

PDF

81.7 KB Created: 2021-09-14 12:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: e96577d43328f2064fc0d0f4b0456c95 SHA-1: 5046161d18a7f6bc8257417de9d056544b607b8f SHA-256: 1ee3e71036ba537510f370bdb2628697f0fb7759ca2509094a98a0fd8d488c09

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm hosted on disposable domains. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=neo+monsters+apk+download', suggest a lure to download potentially unwanted or malicious software. The PDF structure and numerous external links point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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 https://nomylo.ru/uplcv?utm_term=neo+monsters+apk+download PDF link annotation
- http://arisutour.com/ckupload/files/kezinanato.pdfIn PDF document text
- https://thailonghoang.vn/upload/files/gavejiw.pdfIn PDF document text
- https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/79062961033.pdfIn PDF document text
- https://studiecarriere.it/uploads/file/44748826668.pdfIn PDF document text
- https://tidurmalam2.com/contents/files/20873560889.pdfIn PDF document text
- http://hbaoge.com/upload/files/28575110786.pdfIn PDF document text
- http://photopuzzle.net/userData/board/file/putolowexigov.pdfIn PDF document text
- http://brno-skoleniridicu.cz/ckfinder/userfiles/files/bagilatemidopepofi.pdfIn PDF document text
- http://2018.letnifestiwal.pl/ckfinder/userfiles/files/ganuf.pdfIn PDF document text
- http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/nemol.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c15ad8d1701fd6467ae9c10f89812495/povodi.pdfIn PDF document text
- http://pololanna.com/user_img/files/sasolejolifebo.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1d1f082b1---fisezajukaninofoxipapex.pdfIn PDF document text
- http://manu-transport.com/documents/file/89474083852.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/86075749338.pdfIn PDF document text
- http://improntediteatro.it/userfiles/files/18123097906.pdfIn PDF document text
- http://yuanda-boiler.com/d/files/84186586804.pdfIn PDF document text
- https://basundharamart.com/userfiles/file/fofagap.pdfIn PDF document text
- http://www.anjhimayath.com/upload/file/57262045554.pdfIn PDF document text
- https://vadihosting.com/calisma2/files/uploads/wosigoxekibor.pdfIn PDF document text
- https://getadoc.in/ckfinder/userfiles/files/80792720530.pdfIn PDF document text
- http://519pf.com/userfiles/files/ninulepewaru.pdfIn PDF document text
- https://www.mmgrowersg.com/ckfinder/userfiles/files/89404835024.pdfIn PDF document text
- http://st-ark.it/userfiles/files/vulidajixirajozetix.pdfIn PDF document text
- https://infotechsystemsonline.com/ital/www/img/file/66400536739.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_off0000d6ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6AD	18984 bytes
SHA-256: `ea864ff93f2b32d4ab85042fb61df110726183c393905d8c9b1f37fffadb7bbb`
`font_01_sfnt_off000108fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108FC	10616 bytes
SHA-256: `bd8a830a04875d91477dcb4c4eea7555b31e36a40dad68cd1e203c11baf5b52d`
`font_02_sfnt_off00012154.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12154	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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