PDF malware analysis — malicious · 100e58a79ade083e

MALICIOUS

PDF

80.9 KB Created: 2021-09-19 22:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: e1d6b091aa918717ab1ac199a031a1f9 SHA-1: 55ead925eb3c8de2f51d267b6f62a5a3678f3fdf SHA-256: 100e58a79ade083edf1c199c6167df9d0b6a6ac6638d2fd26843305c9b88ab3c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The presence of numerous external links on disposable hosting, combined with the 'Password-protected archive handoff' heuristic, strongly suggests an attempt to trick users into downloading encrypted malware. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to deliver a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://irlanc.ru/uplcv?utm_term=download+rar+apk+for+pc PDF link annotation
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/hjcqmv2kolqalig77v4lhb8ui6/jijavinenezeturabolon.pdfIn PDF document text
- http://texinpack.com/uploadfile/file///2021090616542563.pdfIn PDF document text
- https://openkomm.yussfone-crm.com/userfiles/file/15284956988.pdfIn PDF document text
- http://havefuntogether.com/image/upload/File/16723144083.pdfIn PDF document text
- http://puntolinea.org/userfiles/files/822545711.pdfIn PDF document text
- https://jkmart.net/FCKFiles/File/sabiropivali.pdfIn PDF document text
- http://deeringbayrealestate.com/userfiles/files/jigomazopoturusubaso.pdfIn PDF document text
- https://yptea.com/data/fckeditor/files/pibamojipukajiwozat.pdfIn PDF document text
- http://harrodsrentacar.com/public_html/userfiles/file/bagokajida.pdfIn PDF document text
- http://www.memoriahistoricamalaga.org/ckfinder/userfiles/files/5055008372.pdfIn PDF document text
- http://mentaplywood.com/images_upload/files/39937455677.pdfIn PDF document text
- http://velomagazin.hu/UserFiles/file/17639302842.pdfIn PDF document text
- http://sabaispa.net/userfiles/file/67433421719.pdfIn PDF document text
- http://sandlnae.com/data/editor/file/wananukiwufo.pdfIn PDF document text
- http://cualuoiskydoor.com/webroot/img/files/gimagafaz.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/f7e4c53b036ce932efdf07f0bebfa7de/pefagizavo.pdfIn PDF document text
- https://kitchensofdiablo.com/upload/file/983104314.pdfIn PDF document text
- https://chandrakantmusicacademy.org/ckfinder/userfiles/files/tukilurirolas.pdfIn PDF document text
- http://hftyby.com/upload_fck/file/2021-9-17/20210917191726948286.pdfIn PDF document text
- https://knoxvilleremembers.com/media/61599692328.pdfIn PDF document text
- https://inoxquochoang.com/app/webroot/files/images/pages/files/nematobeveb.pdfIn PDF document text
- https://asoriofrio.org/ckfinder/userfiles/files/32891767245.pdfIn PDF document text
- http://canoeing.by/pics/files/dalunuxuvugawasemas.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_off0000d88a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD88A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f09c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF09C	17752 bytes
SHA-256: `50d058bd86ed64dbac516c135845415796495e670a6225b0d20c96f00aa32c64`
`font_02_sfnt_off00011ecf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11ECF	10304 bytes
SHA-256: `ddf8685fab39b402857472d1d4bcaf5159758061548541abffab23cb79d357db`

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