PDF malware analysis — malicious · 6248ae0f1c774fc5

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 03:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 1f2f269661fc6be67c6ffe3df238d6a2 SHA-1: 79f718402d81b094499f46d0b786c5264b40ff36 SHA-256: 6248ae0f1c774fc50c39ce2623042ffef5f4deba5dda12beae05f35918dde0d4

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 point to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these external 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://synerhu.ru/uplcv?utm_term=read+siege+and+storm+online+free+pdf PDF link annotation
- http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kafaluboviruvelalefosetew.pdfIn PDF document text
- http://ambvetbrashersclavoghisu.eu/userfiles/files/42624314570.pdfIn PDF document text
- http://osc-pribor.ru/products_pictures/file/38067257811.pdfIn PDF document text
- http://cautrucpalang.vn/webroot/img/files/26161531455.pdfIn PDF document text
- https://dursunguney.com/userfiles/files/24874797765.pdfIn PDF document text
- http://studiosimonepantaleo.it/userfiles/files/mudinawarugatexudesuko.pdfIn PDF document text
- http://atlonnuri.org/UpLoadImage/editer/files/pedugirimexisakipu.pdfIn PDF document text
- https://digireg.li/upload/38838402449.pdfIn PDF document text
- http://araratmebel.ru/img/file/7366608665.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136490965984---ragomonal.pdfIn PDF document text
- https://dzido.pl/userfiles/file/55865876735.pdfIn PDF document text
- http://mobilahomedesign.com/userfiles/files/91417050189.pdfIn PDF document text
- http://tsg-edinstvo.ru/userfiles/file/wuxarosomuporotatuvipive.pdfIn PDF document text
- https://md-bud.pl/szklo/photos/file/zezufukumemibowazirewi.pdfIn PDF document text
- https://prcomponents.com/ckfinder/userfiles/files/69112696491.pdfIn PDF document text
- http://kleinschadenexperte.de/userfiles/file/biripokomo.pdfIn PDF document text
- https://nuttydog.hu/ckfinder/userfiles/files/xegoletiberanemumisoxe.pdfIn PDF document text
- http://bamboomfi.com/htdocs/cljr/data/files/35435292819.pdfIn PDF document text
- http://cjmfgx.morefriendship.com/upload/files/36433060280.pdfIn PDF document text
- http://abwmechanicsville.com/uploads/files/juvuvovofixolovubu.pdfIn PDF document text
- http://coachhouse.info/assets/file/ruwagisoxovu.pdfIn PDF document text
- http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/kafelomixupu.pdfIn PDF document text
- http://booklandbooks.com/userfiles/file/nirasusi.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144eeae4ac2d---25885807205.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_off0000ddc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDC9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f5db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5DB	17972 bytes
SHA-256: `878586ec4f8ca2b6fcad48bb83551b009ea4bf2f22721bc4460d47892fe58847`
`font_02_sfnt_off000124d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124D5	10884 bytes
SHA-256: `d72c9dac136a30a52b876aadcdc25033054561761c3c45438957aea66f75d7f2`

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