PDF malware analysis — malicious · 96ab757c4d3cf5e4

MALICIOUS

PDF

70.0 KB Created: 2021-09-28 02:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: a50efdb32dca789a37363ff42de0eb4f SHA-1: ef522dd7cba317eb7dd90f257a4099c8f1e3f709 SHA-256: 96ab757c4d3cf5e4c9db10ff5046b976f257a10829f6f20ccabbc66e4eeb07e9

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a link farm on disposable hosting, likely for malware distribution or phishing. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=apps+movie+for+android PDF link annotation
- http://pibar.tw/uploads/files/202109181551343957.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/95058406592.pdfIn PDF document text
- http://portalpr-b2b.es/img/user//file/_0968428001631875525.pdfIn PDF document text
- http://xn--365-pn7mwb654m2qn.com/ckupload/files/pikopuwanulolefukasemow.pdfIn PDF document text
- http://maidichike.com/upload/files/vevizizejutux.pdfIn PDF document text
- https://linker.tw/files/32246372062.pdfIn PDF document text
- https://nycsmindia.org/ckfinder/userfiles/files/lirebajotemu.pdfIn PDF document text
- https://cjsc.se/ckfinder/userfiles/files/29567483423.pdfIn PDF document text
- https://www.hkha.com.hk/ckfinder/userfiles/files/tonamowagenejazolazopoz.pdfIn PDF document text
- http://raffaelecavazzoni.com/userfiles/files/33934238955.pdfIn PDF document text
- http://edv-denk.com/userfiles/file/xedaxutulawisefem.pdfIn PDF document text
- http://techmechengineers.com/uploads/82989872835.pdfIn PDF document text
- http://shceping.com/upFile/photos/2021-9/file/xivebugirosiruxufete.pdfIn PDF document text
- http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/10449965960.pdfIn PDF document text
- http://mexvp.com/ckfinder/userfiles/files/kegefewemazusab.pdfIn PDF document text
- https://lanjutpt1.com/contents/files/mibixesasajefuno.pdfIn PDF document text
- http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rebida.pdfIn PDF document text
- http://lnimeina.it/userfiles/files/73200547586.pdfIn PDF document text
- http://ilsungwarehouse.com/userData/ebizro_board/file/9805512354.pdfIn PDF document text
- http://wamaeassociates.com/images/uploads/originals/file/xokiwavuzoravobibe.pdfIn PDF document text
- http://henghuitong.com/jingkelun/userfiles/files/20210903131002.pdfIn PDF document text
- http://zsmnowakowski.pl/userfiles/file/56381442731.pdfIn PDF document text
- https://tecnicadovolante.com/images/file/rirapesefexogagobilofajo.pdfIn PDF document text
- http://aostavet.it/userfiles/files/81337965673.pdfIn PDF document text
- http://aalzkj.love-mrt.com/upload/files/pubab.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_off0000b341.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB341	10560 bytes
SHA-256: `06e8531d7dad365055f95d8807f89cb87558a72a46ce5cde788b2efc968b8d25`
`font_01_sfnt_off0000cb57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB57	15512 bytes
SHA-256: `853fcc1d2547e601d7dc0dc81ce8b60109b93408be16aadcf53a8cacdde33d90`
`font_02_sfnt_off0000f24e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF24E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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