PDF malware analysis — malicious · 35f167b3fc19d442

MALICIOUS

PDF

72.2 KB Created: 2021-09-26 09:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: f7e9637e5a14f3c10d9fca685434ae85 SHA-1: 570bfedaa40739906b47bbd27ab199e84962eae4 SHA-256: 35f167b3fc19d442ace9afbff54999f936bd943bdf89e2ac682215479a55e366

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The presence of a link farm on disposable hosting and the ML classifier's high confidence score suggest a phishing or malware distribution attempt. The embedded JavaScript is likely responsible for initiating the download or redirect.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=download+extreme+suv+driving+simulator+mod+apk PDF link annotation
- http://www.binghan.my/userfiles/file/fugebimo.pdfIn PDF document text
- http://salukool.ee/upload/userfiles/file/vilisuzolasise.pdfIn PDF document text
- https://projetovm.com/uploads/files/12103598983.pdfIn PDF document text
- https://lombardpruszkow.pl/local/userfiles/file/bivilamoxomefijigigozin.pdfIn PDF document text
- http://kartywspomnien.pl/uploads/assets/file/17630333101.pdfIn PDF document text
- http://pelejas.com/IMAGENS/CKFINDER/files/goraregagewekefezijodozor.pdfIn PDF document text
- https://francois-daulte.com/ckfinder/userfiles/files/kemibexaze.pdfIn PDF document text
- http://195exim.com/datas/files/xapij.pdfIn PDF document text
- https://opsclown.it/ckfinder/userfiles/files/xefaxewiniw.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1614fe53635829---ranefojakedofizifesoman.pdfIn PDF document text
- http://adimhukuk.com/resimler/files/libudadelujumodi.pdfIn PDF document text
- http://novelinternationalschool.com/ckfinder/userfiles/files/kazawoduwiledojirij.pdfIn PDF document text
- http://konferencii.org/js/ckfinder/userfiles/files/77006361958.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a558115f3---neraritumilegopurir.pdfIn PDF document text
- http://mstreatmentadvances.com/userfiles/files/59635477294.pdfIn PDF document text
- https://machnik.net/ckfinder/userfiles/files/jojomesebiladabevoxujow.pdfIn PDF document text
- http://dgkno.cn/upload/pifixijinipiluxo.pdfIn PDF document text
- http://1hozain.ru/files/userfiles/files/33471152372.pdfIn PDF document text
- http://grgct.com/ckfinder/userfiles/files/50848663308.pdfIn PDF document text
- http://kvarkeno56.ru/userfiles/file/mutodixibomuzapitadefunix.pdfIn PDF document text
- http://uhorder.com/upload/files/56796785458.pdfIn PDF document text
- http://exim5.hu/_user/file/bikomitalararupibem.pdfIn PDF document text
- http://a-swiss.com/upload/userfiles/file/98361867277.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/41727638313.pdfIn PDF document text
- http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/xojag.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_off0000b5ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5AB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cdc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDC2	11180 bytes
SHA-256: `495ceddc302f4990355cf7f83de15c39ddb384468646e7212a8cc275926bd835`
`font_02_sfnt_off0000e7c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7C4	16968 bytes
SHA-256: `2ef0d8d55c49c26cc28ec9438e192517c17700ff87ff911e793c1a41442906d4`

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