PDF malware analysis — malicious · 98314e0843a2fb01

MALICIOUS

PDF

58.2 KB Created: 2021-04-12 09:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: af721066634fad598556cbb7cdce624e SHA-1: 83fa67cc2a0b056f51006ec4ec3b46da23e32672 SHA-256: 98314e0843a2fb01442736f3fadb26c211535ada1256ffd6e6e56bd36df9843b

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or are part of link farms, suggesting a phishing or credential harvesting operation. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to manipulate search results or traffic. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.8225

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 https://www.jwico.com/sites/default/files/webform/vuvosiritixulufanili.pdf In PDF document text
- https://www.dgs-interparts.be/sites/default/files/xufatonapa.pdfIn PDF document text
- https://vectorcorp.net/sites/default/files/webform/resume/wogudodijanaferewinige.pdfIn PDF document text
- http://oaklandchildcare.org/sites/default/files/webform/70037852461.pdfIn PDF document text
- http://www.guninetwork.org/system/files/webform/heirri_proposals/38059385999.pdfIn PDF document text
- https://www.jts.org.jo/sites/default/files/webform/76938035167.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/74647609277.pdfIn PDF document text
- https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/povufukawonafano.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/fabifuturofutip.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/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=fisicoquimica+raymond+chang+tercera+edicion+pdfPDF link annotation
- https://thesanfordschool.asu.edu/sites/default/files/webform/87767597376.pdfIn PDF document text
- https://printandmail.princeton.edu/system/files/webform/83605599331.pdfIn PDF document text
- https://printandmail.princeton.edu/system/files/webform/68272747422.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_off0000cc83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC83	5720 bytes
SHA-256: `7ffed71e9fd67ead7bb0f1c74187f75c2a5b75d4933a8c379defafd00e7f985a`

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