PDF malware analysis — malicious · d445ae01204e4f1d

MALICIOUS

PDF

81.3 KB Created: 2021-09-16 20:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: e5b7336eab6f0f09df26b1481934ff35 SHA-1: d06f2d1a61339ae992ae439c3b33c093a531a1bf SHA-256: d445ae01204e4f1d27bab2143995781c449d65313023bfecc90eaa67662f56ec

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the ML classification strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 5

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.
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://synerhu.ru/uplcv?utm_term=how+to+get+the+alien+gun+in+gta+5+story+mode PDF link annotation
- https://girisimhaber.com/uploads/file/kewunut.pdfIn PDF document text
- http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/migemibuwitafitimovo.pdfIn PDF document text
- https://xaydungdonggia.com/app/webroot/files/images/pages/files/parekoseluz.pdfIn PDF document text
- http://www.tiendadelbordado.com/ckfinder/userfiles/files/kofopevekufubag.pdfIn PDF document text
- https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/18939045019.pdfIn PDF document text
- https://ristovski.mk/public_html/upload/userfiles/file/44028082035.pdfIn PDF document text
- http://flexa.cz/docs/file/83517454126.pdfIn PDF document text
- http://jjburgerut.com/uploads/files/46425906764.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613342af682ba---9398306575.pdfIn PDF document text
- http://baovethanglongmb.com/upload/files/42281305474.pdfIn PDF document text
- https://ph789.com/pinhsuan/files/file/73501645712.pdfIn PDF document text
- http://softwarefactory.nl/images/file/28405187661.pdfIn PDF document text
- http://jtravel.clickis.kr/FileData/ckfinder/files/20210916_0FFF9790704D1C90.pdfIn PDF document text
- http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/97979592955.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e167a4a4c1---12323568297.pdfIn PDF document text
- https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/buviga.pdfIn PDF document text
- http://punaide.com/userfiles/files/69334621830.pdfIn PDF document text
- https://zenit-npk.ru/files/file/60490293813.pdfIn PDF document text
- http://ain.proximeo.com/ckfinder/userfiles/files/sujaninaga.pdfIn PDF document text
- http://www.peritaonline.es/ckfinder/userfiles/files/donikoxize.pdfIn PDF document text
- https://inprovitcolombia.com/ckfinder/userfiles/files/94673005859.pdfIn PDF document text
- http://ruresept.ru/files/file/44978234347.pdfIn PDF document text
- https://laflammerouge.ch/userfiles/files/18956982367.pdfIn PDF document text
- http://restavratorstvo.com/ckfinder/userfiles/files/golezesemetolitilivusumo.pdfIn PDF document text
- https://esvigo.com/upload/files/21618008526.pdfIn PDF document text
- https://eniedu.com/data/file/20210902050047.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_off0000d7a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7A3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000efb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB5	17496 bytes
SHA-256: `8a42376dbd8f101d6f2bc4dd3c4658598c2a24c10b8a19abeac64a14492c2463`
`font_02_sfnt_off00011d0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D0A	11120 bytes
SHA-256: `b4c85085ea942ee4db86994f6ee6a5603cd5d8e9bf0b751f140f9245bb1c42aa`

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