PDF malware analysis — malicious · ce9a48bb14ec756d

MALICIOUS

PDF

80.0 KB Created: 2021-09-24 01:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: a77fae28f6d255cb4d946278ceb19523 SHA-1: e056ee027acfd7c3896652dda98cec1aad7623d4 SHA-256: ce9a48bb14ec756d9d3b13c10dbba78604a07180a80bb6b428a213be4f3d5a2d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous external URIs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the presence of external links indicates an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=bloody+roar+2+apk PDF link annotation
- http://antansconstructions.com/ckfinder/userfiles/files/penutejonawabuzikepode.pdfIn PDF document text
- http://www.europesolidaire.eu/userfiles/files/rapivetorofutage.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/94cda3cea2e60ed576b162c1dfbb6b0b/42570099472.pdfIn PDF document text
- http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/93545467669.pdfIn PDF document text
- http://tiendanatacion.com/noticias/files/vewanexizexubinadagurejab.pdfIn PDF document text
- http://xlpe.net/Images_upload/files/90526190730.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f6088dc11---kevunaromimanavemajo.pdfIn PDF document text
- http://infinivideo.hu/sites/infinivideo/files/reromus.pdfIn PDF document text
- http://parkingparts.com/Upfiles/file/73069915436.pdfIn PDF document text
- https://ddnepal.com/assets/userfiles/files/lojosimomop.pdfIn PDF document text
- http://alsace.annuaire-regional.com/ckfinder/userfiles/files/44189112420.pdfIn PDF document text
- http://nguoigiupviec99.com/webroot/img/files/26082299521.pdfIn PDF document text
- https://gaziemirkentkonseyi.com/upload/files/livusapexerosuribu.pdfIn PDF document text
- http://pawsandtiaras.com/ckfinder/userfiles/files/bowogadameke.pdfIn PDF document text
- https://bahamianbrewery.com/ckfinder/userfiles/files/27114811200.pdfIn PDF document text
- https://www.andreivieru.com/ckfinder/userfiles/files/85413667511.pdfIn PDF document text
- http://sharon-barron.com/userfiles/files/29426461727.pdfIn PDF document text
- https://egokituz.org/files/galeria/files/35330584512.pdfIn PDF document text
- http://apsons.eu/files/file/24414232421.pdfIn PDF document text
- https://biodez.lt/i/File/92143025740.pdfIn PDF document text
- http://naturenhuman.com/app/webroot/userfiles/file/xapifojitotiviwazulanedo.pdfIn PDF document text
- http://aodaiminhhanh.com/app/webroot/uploads/files/50711806850.pdfIn PDF document text
- https://tigaintan.com/contents/files/2204976917.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_off0000d51d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD51D	10172 bytes
SHA-256: `4e9de8937aac07be6872d8dc0d23353b9528ecfef90ee5a9cc4798ea373b5053`
`font_01_sfnt_off0000ec0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC0D	17884 bytes
SHA-256: `f5f7e06b39329c9a991b1fd2513d25024bf0980c9dcd526b04d8a129d3108827`
`font_02_sfnt_off00011aa4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AA4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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