PDF malware analysis — malicious · dda71f88bc71f3d7

MALICIOUS

PDF

70.7 KB Created: 2021-09-10 17:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: acfbe68692514180fc65d9823c36ef1d SHA-1: 37f23772e500a90c8fa49de21ca5f59aeaa006d6 SHA-256: dda71f88bc71f3d7a112a932932e102acf39927e8d7deec5f3e76d3164d1df42

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. Heuristics indicate it functions as a link farm, containing numerous links to disposable domains, suggesting a phishing or malware distribution attempt. The embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.5455

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://b40555.handyfriendship.com/upload/files/92301524825.pdf In PDF document text
- https://riwg.in/userfiles/file/mulazikemevotu.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/wuxumojubuje.pdfIn PDF document text
- https://ptogel2.com/contents/files/98250614535.pdfIn PDF document text
- http://studioagm.it/userfiles/files/mubewefaxijabawapapakax.pdfIn PDF document text
- http://dishandspoonproductions.com/ckfinder/userfiles/files/47807811528.pdfIn PDF document text
- http://t-p-fortune.com/userfiles/file/117162178.pdfIn PDF document text
- http://casaledellasignora.it/userfiles/files/16922599289.pdfIn PDF document text
- http://vinhomeshaiphong.net/app/webroot/img/files/galavavuxifofotibaweraja.pdfIn PDF document text
- https://pyccenter.com/images/Upload/file/70952272420.pdfIn PDF document text
- https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/22207173485.pdfIn PDF document text
- https://costabravas.com/uploads/localidades/files/64562013398.pdfIn PDF document text
- http://language-coach.pl/uploads/files/32651303718.pdfIn PDF document text
- http://hurtowniagrafit.pl/userfiles/file/52254081370.pdfIn PDF document text
- https://iamtimeshare.com/userfiles/file/18101890766.pdfIn PDF document text
- https://dreptultau.hotnews.md/upload/userfiles/files/28339407662.pdfIn PDF document text
- http://www.tiande-global.com/ckfinder/userfiles/files/lonitojinabojatu.pdfIn PDF document text
- https://moderator.lt/components/com_mijoshop/opencart/image/data/files/matuwulilelenamekewexatig.pdfIn PDF document text
- http://duda-tech.pl/dudatech/upload/file/61537520675.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/0c5bdfe572ca1c6b646d3107f86cb613/mipegemabirigimu.pdfIn PDF document text
- https://drivetripper.com/userfiles2020/files/jabovaduvakakalanija.pdfIn PDF document text
- https://leo.tw/upload/ckeditor/files/7434585981.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=virtualbox+android+wifiPDF 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_off0000cbbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBBE	17732 bytes
SHA-256: `7a825059a398a3ff19297f12ae85ab0c7336baa9ba753bd0e10fba657d16a7a7`
`font_01_sfnt_off0000f9fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9FD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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