PDF malware analysis — malicious · 6dfbb518a7afca0d

MALICIOUS

PDF

98.9 KB Created: 2021-09-11 02:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 041fb92f8973d91b006ea4edcf084730 SHA-1: 3288c93c11be06727add59d9ab3a25245a283a0e SHA-256: 6dfbb518a7afca0dd4464e4e4a52b6d2b6486a65b0e26e7085323bd30ad903f8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature, likely indicating it's used as a lure to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

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
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://pistant.ru/uplcv?utm_term=card+heroes+mod+apk PDF link annotation
- http://acsalma.hu/userfiles/files/vomagugegideso.pdfIn PDF document text
- https://anakaygame.net/calisma2/files/uploads/92205092466.pdfIn PDF document text
- https://habibitours.com/ckfinder/userfiles/files/6031453048.pdfIn PDF document text
- http://gpsputhuppally.com/userfiles/file/58030992430.pdfIn PDF document text
- http://lyzph.com/userfiles/file/Fl202109030658278235.pdfIn PDF document text
- http://mnarch.it/userfiles/files/xagevawitowimun.pdfIn PDF document text
- https://g55net.com/webpagebuilder/ckfinder/userfiles/files/puzetotofaw.pdfIn PDF document text
- http://donghotam.com/luutru/files/84501805282.pdfIn PDF document text
- https://stpatswatertown.org/ckfinder/userfiles/files/4127523352.pdfIn PDF document text
- https://habibitours.net/ckfinder/userfiles/files/zanijup.pdfIn PDF document text
- http://ecompletecontact.com/ckfinder/userfiles/files/79667964746.pdfIn PDF document text
- http://graviroz.hu/ckfinder/userfiles/files/57923103660.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec9474a645---59136151891.pdfIn PDF document text
- http://cloudinfo01.smartevolve.com/images/ckeditor/files/67454331108.pdfIn PDF document text
- http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/zojali.pdfIn PDF document text
- https://viceda.com/userfiles/file/22479782862.pdfIn PDF document text
- https://drproperty.in/userfiles/file/19955852125.pdfIn PDF document text
- http://arabic.cz/ckfinder/userfiles/files/98372561406.pdfIn PDF document text
- http://szpitalstrzelin.pl/userfiles/files/79277081945.pdfIn PDF document text
- http://abyss.sk/userfiles/file/fisuvofepanorebibezugema.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8h743od8hgtu6e79edc3n5kn45/jipuripa.pdfIn PDF document text
- http://ideviceplus.be/app/webroot/files/userfiles/files/rizedukalitivapagavup.pdfIn PDF document text
- https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/dozazibagidom.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_off00011b90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B90	19620 bytes
SHA-256: `97b29ed42814967825b300e6775ad088b28234871d2d39dbb7e02c5249627e54`
`font_01_sfnt_off00014eb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14EB2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000166c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x166C9	10440 bytes
SHA-256: `054301c53a3f950d7cf30075567ccaf2331a34c2caa993cd568a695edcc9ac20`

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