PDF malware analysis — malicious · b8765bd643b83021

MALICIOUS

PDF

86.6 KB Created: 2021-09-12 00:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 5f0874bb9d504abaea8abe2c34b3e358 SHA-1: 183e353f791123e96d79a5e9892d3c35a316403c SHA-256: b8765bd643b83021dfd41a0e62d0e119ce0b8a7a7776974375e63badd2b38d51

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous links to external domains, many of which are likely part of a link farm designed to obscure the ultimate destination or host malicious content. The heuristic 'SE_URGENCY_LURE' suggests the document may employ deceptive language to prompt user interaction.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://kitchensofdiablo.com/upload/file/55493186154.pdf In PDF document text
- https://tannhatviet.vn/upload/files/pujikutowaxobutix.pdfIn PDF document text
- https://gentrilieu.vn/userfiles/file/larudinaran.pdfIn PDF document text
- http://suliaok.com/v15/Upload/file/2021951749215224.pdfIn PDF document text
- https://kozmetikadunakeszi.hu/userfiles/file/fefovuzotoledade.pdfIn PDF document text
- https://planet-pvc.com/upload/files/zotavovugidivanak.pdfIn PDF document text
- http://rickgrisolia.com/userfiles/files/widovakufiwemusi.pdfIn PDF document text
- https://datajournonepal.org/files/kubetizesap.pdfIn PDF document text
- http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/ravefiruwuzaderapereri.pdfIn PDF document text
- https://austarpharma.com/upload/files/78042841018.pdfIn PDF document text
- http://unternehmensberatung-hegenbarth.com/userfiles/file/87644133153.pdfIn PDF document text
- https://suacuacuontoanphat.com/upload/files/pusujuvoju.pdfIn PDF document text
- http://hotel-gerard-dalsace.com/upload/document/74142651957.pdfIn PDF document text
- http://kovospm.cz/fotky/file/25245584945.pdfIn PDF document text
- http://canadianrockies.ca/files/file/14452762671.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161335de8588b9---nufagadogipapidaxefafurok.pdfIn PDF document text
- http://kameleonhastanc.hu/files/file/51926594545.pdfIn PDF document text
- http://nowator-zpu.pl/userfiles/file/nasinofib.pdfIn PDF document text
- http://deauville.ru/files/file/gusubadufidiwigotubud.pdfIn PDF document text
- http://maimungkorn.com/UserFiles/file/xunal.pdfIn PDF document text
- http://hizirferforje.com/admin/fckeditor/editor/images/file/nitufapewi.pdfIn PDF document text
- https://greenfins-thailand.org/uploads/file/35424361851.pdfIn PDF document text
- http://infiniti.e-library.tw/uploads/files/kitow.pdfIn PDF document text
- https://galerieportelouise.be/userfiles/files/28879106862.pdfIn PDF document text
- http://lpkgoodframeupvc.com/userfiles/files/tofipopusokebenepupusakid.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=apk+minecraft+beta+gratisPDF link annotation
- 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_off0000e73c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE73C	19992 bytes
SHA-256: `58fc86b6b95768807ad901f11d91b4bea94c527d54b3e0fe8eab289638c883fe`
`font_01_sfnt_off00011b9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B9A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000133b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133B1	10868 bytes
SHA-256: `66e117f4f375fd455e94e3edf7a4364dcc21863f8f3da845f42ba917a4cff1c6`

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