PDF malware analysis — malicious · d3794f6cf01d4725

MALICIOUS

PDF

87.0 KB Created: 2021-09-17 22:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: f55ad86790f15db90975bfe79eb95c0c SHA-1: ebea5d5f535128f7aa3d2510592d615889196dd1 SHA-256: d3794f6cf01d4725ac8809bf3feb842213729a6d090c4985c7e7a9d0f3cb47c8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The heuristic 'SE_URGENCY_LURE' indicates the document may contain deceptive text to prompt immediate user action.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://catamma.ru/uplcv?utm_term=gtv+live+cricket+bangladesh+west+indies PDF link annotation
- http://hongsung114.com/files/fckeditor/file/15739924807.pdfIn PDF document text
- https://guruvinodji.com/Userfiles/file/12198934489.pdfIn PDF document text
- http://vistobrasil.net/uploads/file/48662914257.pdfIn PDF document text
- http://360global.ca/userfiles/file/53884072832.pdfIn PDF document text
- http://alituncer.com/userfiles/file/44903734158.pdfIn PDF document text
- http://haai.org/upload/file/jivaxitulapiwalel.pdfIn PDF document text
- https://netcsemege.hu/ckfinder/userfiles/files/rutemiteparuron.pdfIn PDF document text
- https://natinsel.com/imagenes/file/53303687497.pdfIn PDF document text
- http://pc580.cn/upload_fck/file/2021-9-6/20210906012143621542.pdfIn PDF document text
- http://wx-test.com/upload/ckimg/files/202109072131305576.pdfIn PDF document text
- http://studioingtassinari.eu/userfiles/files/fakemivatetolanazev.pdfIn PDF document text
- http://rockpapersun.com/upload_mce_image/file/39683008421.pdfIn PDF document text
- http://eptesteplelek.com/uploads/file/wawezerefikemafi.pdfIn PDF document text
- http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b74699c574---96442001444.pdfIn PDF document text
- http://pravkniga.ru/files/userfiles/files/pamokede.pdfIn PDF document text
- https://chowdhurytourism.com/ckfinder/userfiles/files/fajezebakixixunagoporeg.pdfIn PDF document text
- http://npi-management.com/ressource/site-image/files/nigigolepowejolizagen.pdfIn PDF document text
- https://dejavuruse.com/userfiles/file/mesubijikuxerejugozofox.pdfIn PDF document text
- http://hausdergesundheit.net/userfiles/files/lemolubuvikavulosuse.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/7ae95f85c9890bcf43cc066e92f39c8e/kizuwogusanezinelaxujavob.pdfIn PDF document text
- http://gasasosong.com/upload/fckeditor/file/7935169108.pdfIn PDF document text
- http://pngroup.pl/ckfinder/userfiles/files/kadufusigimixodifoboboxi.pdfIn PDF document text
- http://khachsanmyngoc.com/upload/files/kapojitur.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_off0000e774.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE774	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ff86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF86	20320 bytes
SHA-256: `92307e8834a84dd8bf8fe1c901694b369e8c49f0d81191abfb02a3a120ef1130`
`font_02_sfnt_off0001352b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1352B	10952 bytes
SHA-256: `10cc052679a3622aac9baba68c99130c0ac4247ad19441a4af3e567fe062ce8d`

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