PDF malware analysis — malicious · 00805eb08c4f0642

MALICIOUS

PDF

118.9 KB Created: 2021-10-06 16:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 083f5730062a0b67a7b6bacbb99695d3 SHA-1: c9bd7d4428b07dd3b89212b0e74b5f0b030b385b SHA-256: 00805eb08c4f06420301efd9fd94893b355eb191dc6197fe39c9cd18df7cf7b0

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, a common tactic for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, offering no direct user-facing lure.

Machine Learning

Nyx PDF Classifier clean score 0.0691

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://pinyardim.com/calisma2/files/uploads/takizodezanijoj.pdf In PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369ef8ef03f---ledonopeguxirexe.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/j0vrulfkf4gu3dbmq0rpktp3t9/64963398840.pdfIn PDF document text
- http://pekingtogo.com/uploads/files/4711649808.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16150dc3428286---rogetufekegekorokeziz.pdfIn PDF document text
- http://semihkerpiccilervesupersound.com/upload/file/gapizewozabovaduno.pdfIn PDF document text
- https://quanghuydulich.vn/img_duhoc/files/26741364563.pdfIn PDF document text
- http://oikoscoccatoarchitettura.com/userfiles/files/motave.pdfIn PDF document text
- http://nemeckystrakac.sk/editor_uploads/files/fufoxe.pdfIn PDF document text
- https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/34572773988.pdfIn PDF document text
- http://saxonrt.hu/img/userfiles/files/ligitefejoroj.pdfIn PDF document text
- http://sparan-art.ru/ckfinder/userfiles/files/pewemejatawesisokut.pdfIn PDF document text
- http://cesurmakina.com/userfiles/file/57948337977.pdfIn PDF document text
- http://residenceraffaellotorino.com/userfiles/files/zevutiluwalurinab.pdfIn PDF document text
- http://ms-beauty.com/ckfinder/userfiles/files/dutudutom.pdfIn PDF document text
- https://nazrabilisim.com/calisma2/files/uploads/23259926093.pdfIn PDF document text
- https://delcinfo.ru/img/files/files/78646477914.pdfIn PDF document text
- http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/68117977254.pdfIn PDF document text
- http://zzquansu.cn/d/files/tapev.pdfIn PDF document text
- http://engcaphone.com/_UploadFile/Images/file/77238760392.pdfIn PDF document text
- https://novamakine.com/upload/ckfinder/files/wasezitovetetupivojedotil.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=a+5.2+molal+aqueous+solution+of+ch3ohPDF link annotation
- 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_off00016a6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16A6C	22096 bytes
SHA-256: `c9f5d870bbd543e40b0927b3d8fb3e4918781ef34f9c52111a1583291b53052b`
`font_01_sfnt_off0001a447.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A447	11220 bytes
SHA-256: `48868aa88b16b5280e64d8bc07e00d859a7cdcf57d31bfbf94d5271de8af4c3e`
`font_02_sfnt_off0001be7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BE7F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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