PDF malware analysis — malicious · d61eba539dbe0714

MALICIOUS

PDF

72.0 KB Created: 2021-08-30 06:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2607e15950c05bf9c9d429c0acf45edd SHA-1: 37dfa0d02b2d229d01a7e97024f3017f6482c932 SHA-256: d61eba539dbe071492018e6d98bbf786e8d030fbc94d4e207fbbc522db555a74

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond what the heuristics reveal.

Machine Learning

Nyx PDF Classifier malicious score 0.8612

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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
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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117f8463e812---losurexamarimom.pdf In PDF document text
- https://savitravel.ro/ckfinder/userfiles/files/39946846244.pdfIn PDF document text
- http://redondoclassicburger.com/uploads/files/52613904720.pdfIn PDF document text
- http://mytmbc.org/fckimage/file/50160187354.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2bf24344b---vatikinezusukupiwokatazu.pdfIn PDF document text
- http://travelport.pl/userfiles//file/96524974592.pdfIn PDF document text
- http://waltonjohnsonfamily.com/clients/870437/File/95556579905.pdfIn PDF document text
- http://de-ko-gmbh.com/ckfinder/userfiles/files/35593974753.pdfIn PDF document text
- http://newtarrytowndeli.com/uploads/files/52464659021.pdfIn PDF document text
- http://accessiblevehicleservices.com/userfiles/file/tozovejizataxud.pdfIn PDF document text
- https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/r9bnhkh52bt9egptd05i3qi3qh/2634225825.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd98aa76ad4---tutuxuvoduzefogadugubowos.pdfIn PDF document text
- https://kurishupally.org/userfiles/file/rejajuloxo.pdfIn PDF document text
- http://www.bordadoindustrial.com/ckfinder/userfiles/files/rotesoxozo.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f9c15381d03fd3f15e6b97dfbac22338/13005634768.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/9a411fa7e4584ae5cc3e3b41997e4871/gakizawegugekefegese.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/e8afe2ad5dbe29979ce416c3833370e5/82137148115.pdfIn PDF document text
- https://festival.bg/fckeditorfiles/file/vutavojusotivakegu.pdfIn PDF document text
- http://malagi.pl/user-files/fck/file/genafizarogavoferix.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8d18eebd2---88468329936.pdfIn PDF document text
- http://avvocato-callegaro.it/public/file/zedumobutidid.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841bbe95863---pemip.pdfIn PDF document text
- https://vanphongphampmc.com/upload/files/60524748392.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4db17cd97c---munufesapuxuxuzesirejabe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=certification+test+answersPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE3B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f64d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF64D	17620 bytes
SHA-256: `6c32910062d0ab7e01f52ae10e9754a0474fc6d0264f1763eee70ba8d80d71bc`

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