PDF malware analysis — malicious · 9395498cce543a51

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 06:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: a9ff68ff1806936abb6ca2db93d231fa SHA-1: 7102cc7a92b82284ce3f5aef20fe08a6187e0d9d SHA-256: 9395498cce543a5176e759b52e39114d883633218eafb35f3dd27c752df9021c

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=fmovies+downloader+2020 PDF link annotation
- http://ayrh.internet-match.com/upload/files/19411524334.pdfIn PDF document text
- http://canadapremiumlubes.com/survey/userfiles/files/gedemikikutapizew.pdfIn PDF document text
- http://ristorantebiscione.com/userfiles/files/90335529532.pdfIn PDF document text
- https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/13987806737.pdfIn PDF document text
- https://n-tlg.com/files/file/lodedotupuxokepawosufa.pdfIn PDF document text
- http://lejonhund.com/upload/33798433050.pdfIn PDF document text
- http://webspace.mysdam.net/images/newsletter/files/86901736053.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/59a5008259302ee464a689164c79418a/273521580.pdfIn PDF document text
- http://langfordfinancialservices.com/userfiles/files/3752981817.pdfIn PDF document text
- http://gillsandgeckos.com/userfiles/file/dorobifunezuxap.pdfIn PDF document text
- http://yejiya.com/userfiles/file/178929664.pdfIn PDF document text
- http://kargo-box.com/uploads/files/1107926571.pdfIn PDF document text
- http://merydian.pl/nowymerydian/userfiles/file/2238038962.pdfIn PDF document text
- https://luxesystem.site/js/ckfinder/userfiles/files/93168322984.pdfIn PDF document text
- http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
- https://eastmangroup.org/ckfinder/userfiles/files/2209702963.pdfIn PDF document text
- https://sagarexpress.com/userfiles/file/32962489321.pdfIn PDF document text
- http://evevoyance.fr/adh/.-/file/zeragitejowonoteju.pdfIn PDF document text
- http://keifo.ru/ckfinder/userfiles/files/nisagaxevefagatutuxepi.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161471981f08c0---tatotugunutozopebatulo.pdfIn PDF document text
- https://pasationtravellers.com/root/FCKeditor/file/34894522689.pdfIn PDF document text
- https://betsin.org/userfiles/files/gifojamavarapudawurazeba.pdfIn PDF document text
- 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_off0000d422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD422	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ec39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC39	10680 bytes
SHA-256: `25c66cbdf1539f0f72c118820316fbb876201edf501110dd7b9c85aef31aab98`
`font_02_sfnt_off000104be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104BE	17476 bytes
SHA-256: `a78fac0ef48e54934d8c139aa2f1cdb2a88f87f50d68c8ebbb5e6148baa93b3f`

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