PDF malware analysis — malicious · 9a61afc984b0b93f

MALICIOUS

PDF

117.1 KB Created: 2021-04-26 11:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: ee49e26ca52ce5d395361da28253d5f3 SHA-1: 175516c5fb741189251068521c409648739b5c37 SHA-256: 9a61afc984b0b93f6320ff8fdda87da463d31d72f006ff1f46a18bee15e6e5ba

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external URLs, some of which are hosted on potentially disposable domains. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it is designed to redirect users to malicious sites, potentially for phishing or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://www.natsihwa.org.au/sites/default/files/webform/17947704001.pdf In PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/bekam.pdfIn PDF document text
- https://www.uts.cw/sites/default/files/webform/tidenopuzi.pdfIn PDF document text
- https://www.telluridescience.org/sites/default/files/tstc-applications/90077644064.pdfIn PDF document text
- http://www.pbttphtk.gov.my/sites/default/files/webform/fadubapep.pdfIn PDF document text
- https://www.ofalloncasting.com/sites/default/files/webform/mibotemesasis.pdfIn PDF document text
- https://www.uts.cw/sites/default/files/webform/89737617204.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/17654710786.pdfIn PDF document text
- https://www.jsif.org/sites/default/files/webform/95147346690.pdfIn PDF document text
- http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/sumeli.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=fx+115es+plus+radian+modePDF link annotation
- https://ec.europa.eu/eip/agriculture/sites/default/files/webform/76225898136.pdfIn PDF document text
- https://community.princeton.edu/system/files/webform/vujipudujusikal.pdfIn PDF document text
- https://campusrec.princeton.edu/system/files/webform/rilawadabovoxilezevateg.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001afb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AFB1	5304 bytes
SHA-256: `e590a0fcaf749212192e1cdcbfc2a6bec6a2f0713d904402b5b5b1b37d836d0e`

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