PDF malware analysis — malicious · 4e348b97f7cea22f

MALICIOUS

PDF

62.6 KB Created: 2021-09-27 07:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: 49df02419d567dd41f03377e47171350 SHA-1: d69848a15e042c0ce372e507f5b640f7efce7487 SHA-256: 4e348b97f7cea22f563ebfb7a8522f05e0e8b8459cad31b84f7339fc66793e03

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.7092

Heuristics 4

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.
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 http://mc-opony.pl/files/file/45444616247.pdf In PDF document text
- http://www.mamafoundation.cz/ckfinder/userfiles/files/loxasofod.pdfIn PDF document text
- http://onroerendgoedindex.nl/images/uploads/8502787942.pdfIn PDF document text
- http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/vuvaxitamenaruti.pdfIn PDF document text
- http://fikszo-whc.com/userfiles/files/83324925861.pdfIn PDF document text
- http://sm300159.agchost.com/userfiles/files/ruxabozetiwel.pdfIn PDF document text
- http://newabel.com/ckfinder/userfiles/files/fewunudurolekutavonifajiv.pdfIn PDF document text
- http://microsolder.hu/userfiles/files/12605763320.pdfIn PDF document text
- http://skrutit-probeg.ru/upload_picture/file/55341146336.pdfIn PDF document text
- https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/789235489.pdfIn PDF document text
- https://pisausakti.com/contents/files/7685795273.pdfIn PDF document text
- http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/226479944.pdfIn PDF document text
- http://anhhuynoithat.com/asset/files/49266118078.pdfIn PDF document text
- http://messtores.ca/fck_user_files/file/roxugutekovagorewef.pdfIn PDF document text
- https://jatransfer.com/userfiles/file/refofoxop.pdfIn PDF document text
- https://namkhoasaigon.vn/web/images/files/86490716709.pdfIn PDF document text
- http://think6.net/ckfinder/userfiles/files/20210914093011.pdfIn PDF document text
- http://fantacyhandicraft.com/userfiles/file/kiwutu.pdfIn PDF document text
- http://bouwbedrijfbouwheer.nl/userfiles/file/xifixuxekijaxage.pdfIn PDF document text
- http://gpkoaee.ru/ckfinder/userfiles/files/96944680587.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/161368495adf1d---sonugomizuvatozaram.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+voice+changer+for+androidPDF 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_off0000ac51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC51	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c463.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC463	14832 bytes
SHA-256: `9f8aeec56660489fa51a94522733d0563b189a572ffc38a8bd5206a33507f136`

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