PDF malware analysis — malicious · 0fcf73e84895dd0a

MALICIOUS

PDF

81.5 KB Created: 2021-09-22 10:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 47478029f1a01aa2300ee58e955dc9fb SHA-1: 237d239f3792a5becfd284d8e845a81e55046c68 SHA-256: 0fcf73e84895dd0aa59108d9eee98bae773307d47910c4b35b87b90618812b36

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of external links hosted on disposable domains, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://fuoriscena.eu/file/39256937842.pdf In PDF document text
- http://accessprecision.com/userfiles/file/wogezesu.pdfIn PDF document text
- https://exam11.menapoint.com/app/webroot/upload/files/wakuxuridugorobuj.pdfIn PDF document text
- http://rafaelstore.ru/upload/files/moxisetexelajid.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144417dde3a3---gunenapozemovumibasap.pdfIn PDF document text
- http://www.gulbaharsigorta.com/contentData/file/vabun.pdfIn PDF document text
- http://toyotaprius-custom.com/js/upload/files/novalere.pdfIn PDF document text
- https://myparrotfood.com/user_files/files/90190210117.pdfIn PDF document text
- http://rszm88.com/upfolder/e/files/20210912045918.pdfIn PDF document text
- http://hotechike.com/files/files/rimajimixuzu.pdfIn PDF document text
- http://falerisztika.hu/tmp/sejelovidumotilene.pdfIn PDF document text
- http://myepres.com/HotelEstimator/userfiles/file/50818641638.pdfIn PDF document text
- http://www.memoriahistoricamalaga.org/ckfinder/userfiles/files/33725745854.pdfIn PDF document text
- https://extremedriveline.com/ckfinder/userfiles/files/jirivigupowovunowaxa.pdfIn PDF document text
- https://livresdarts.com/ckfinder/userfiles/files/449194186.pdfIn PDF document text
- http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29305916553.pdfIn PDF document text
- http://czpohledavky.cz/userfiles/files/nofarisalotisi.pdfIn PDF document text
- http://zetrade.cz/userfiles/file/xogozukameburex.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1614361780061b---meweku.pdfIn PDF document text
- http://asv-solnice.cz/_files/file/newadorugorokarimaf.pdfIn PDF document text
- https://m-isc.com/userfiles/file/sitidugu.pdfIn PDF document text
- http://ttfi.org/app/webroot/userfiles/file/lofugepulubosax.pdfIn PDF document text
- http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/bomebezula.pdfIn PDF document text
- https://suadienlanhhanoi.net/upload/files/74460643955.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=forces+of+freedom+removed+from+play+storePDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d5e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000edff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDFF	10740 bytes
SHA-256: `b5fb570dbc53115cb4c643368cf6212b9597815dd91bc3f1a5d770805ba5ad21`
`font_02_sfnt_off000106cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106CD	18996 bytes
SHA-256: `524ec901f25902bdb8a0cb7fe34408cd29642a43f15779bea69ec397720f801f`

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