PDF malware analysis — malicious · 52e805befad5e566

MALICIOUS

PDF

73.4 KB Created: 2021-02-20 21:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fa40653e7be8f35613ebbcbd0ac5acfe SHA-1: db7820bcd8fd029b8adfd7675ab74d6ff906411d SHA-256: 52e805befad5e566cae4318c5bd76979047359ebb3abb1d6756c4a49c5bd28fa

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it uses a browser extension installation lure. The embedded URL points to a domain associated with malicious activity. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user trust for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://bologen.ru/wix?keyword=grateful+dead+album+download
- https://static.s123-cdn-static.com/uploads/4408471/normal_5fcc02236f02a.pdf
- https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/lipige.pdf
- https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/724436.pdf
- http://medyahanem.com/ejes_de_simetria_ejercicios_primariaxcntn.pdf
- http://esmoney.site/73004375011tygq0.pdf
- https://junowebabozem.weebly.com/uploads/1/3/5/9/135965754/c58ffed4695aaf6.pdf
- https://cdn-cms.f-static.net/uploads/4408340/normal_5fd30cc178356.pdf
- http://maliwalilaz.22web.org/janekuwomutolegapid.pdf
- http://de-bewertung-id2842384.icu/sitemap_template_xdl1c14.pdf
- https://cdn.sqhk.co/puwukuwos/Qgegcjj/37073219494.pdf
- https://cdn.sqhk.co/repejuvovod/hcljbjb/suzerevaxadubasinevimu.pdf
- http://svarka-aurora.online/75565332532du2hw.pdf
- https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/096fca.pdf
- https://cdn.sqhk.co/wolebiduju/NqgchhU/the_crossing_park_las_vegas_nv.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://zilifafaxizi.rf.gd/acquiring_application_information.pdf
- http://bixikaw.epizy.com/40248240814.pdf
- http://pinezininefos.epizy.com/nexiwaxi.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e2b5.bin` `d5ca2975397f3c91756aa39a6a714fdb8eda21e6ea12483b498698445a53ea11`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2B5	5140 bytes
`font_01_sfnt_off0000f42d.bin` `96033fc3217d44ed5e84ebab1fc436f998b7345dffa255480cc64d06b553ca7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF42D	10644 bytes

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