PDF malware analysis — malicious · dc1f3810468d8b6f

MALICIOUS

PDF

68.1 KB Created: 2021-04-12 18:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05

MD5: 999821d8cca877a1c724f12185aa8663 SHA-1: d8b90f78509e4a8b94414eda75c0ccf051199f50 SHA-256: dc1f3810468d8b6f0e829724827a50a75c8539bcf95981d7bcb1566637e0c0d2

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifying it as a link farm designed to direct users to potentially harmful sites. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

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://www.friendlycc.com/sites/default/files/webform/98819861428.pdf In PDF document text
- http://pilgrimland.com/sites/default/files/webform/resume-uploads/64296936159.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/95133977644.pdfIn PDF document text
- https://natsihwa.org.au/sites/default/files/webform/17015803.pdfIn PDF document text
- https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/tajiwugebewozebukak.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/GLLx1DTH0VQ/uplcv?utm_term=acuerdo+ministerial+de+evaluacion+2018PDF link annotation
- https://minorsoncampus.princeton.edu/system/files/webform/xadumiwedom.pdfIn PDF document text
- https://gradfutures.princeton.edu/system/files/webform/48950823745.pdfIn PDF document text
- https://printandmail.princeton.edu/system/files/webform/21250884575.pdfIn PDF document text
- https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/jonigumeneritid.pdfIn PDF document text
- https://lib.asu.edu/system/files/webform/98562832035.pdfIn PDF document text
- https://thesanfordschool.asu.edu/sites/default/files/webform/87767597376.pdfIn PDF document text
- https://ec.europa.eu/eip/agriculture/sites/default/files/webform/66140853426.pdfIn PDF document text
- https://printandmail.princeton.edu/system/files/webform/67925993666.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_off0000e5bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5BB	5656 bytes
SHA-256: `2776cd3341d285bbf99229343c1e7f85daba88428e39e70afc83b76b9399a562`

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