PDF malware analysis — malicious · 9a7f854a340e2959

MALICIOUS

PDF

71.5 KB Created: 2021-09-10 22:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ef0fb0e2389215da689b4a71694987ec SHA-1: e00fac4137d0c095e98070cc2183b8f5a3c97fc6 SHA-256: 9a7f854a340e2959e170168b14cc1975bf8c001d48d44e70e0792bd082f6fd4d

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of distinct, disposable domains used for hosting links, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://jhservice.net/imagenes/galeria/files/31274078674.pdf In PDF document text
- http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/pikanidajufadepowat.pdfIn PDF document text
- http://farmaciafici.com/userfiles/files/26539782154.pdfIn PDF document text
- http://dietaltop.com/userfiles/files/96971130468.pdfIn PDF document text
- https://wildarium.com/ckfinder/userfiles/files/30648237599.pdfIn PDF document text
- http://rulada.by/upload/editor/files/verixubeveri.pdfIn PDF document text
- http://kapalishakti.com/ckfinder/userfiles/files/3815983066.pdfIn PDF document text
- https://birudongker.com/contents/files/kegeronotezinuketapi.pdfIn PDF document text
- http://harnettcountyhba.com/userfiles/file/13677043402.pdfIn PDF document text
- https://finliz.lt/i/File/10584415499.pdfIn PDF document text
- http://polymer-optix.de/userfiles/file/pufudoxusikefojumari.pdfIn PDF document text
- https://meganimal.pt/site/upload/file/talusakeluxoresawofifub.pdfIn PDF document text
- http://esteticka-stomatologie.cz/files/content/file/57837702713.pdfIn PDF document text
- http://ttlh.vn/storage/ckfinder/files/runimufebunumisage.pdfIn PDF document text
- http://climacom.eu/userfiles/files/16878844909.pdfIn PDF document text
- https://alquimia.in/admin/fckeditor/editorfile/63268758518.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137f056c2347---68359289701.pdfIn PDF document text
- https://wintechindia.in/ckfinder/userfiles/files/77352407452.pdfIn PDF document text
- http://bjsixiang.com/jingkelun/userfiles/files/20210910154929.pdfIn PDF document text
- https://seeandhearbetter.ie/img/shop/contents/35066745882.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/93669945342.pdfIn PDF document text
- https://aristi-trap.com/upload/users/files/44298679752.pdfIn PDF document text
- http://pixel-pro.ru/upload/file/rosirelibudozuwoduwoxeto.pdfIn PDF document text
- http://lexus-custom.com/js/upload/files/juneval.pdfIn PDF document text
- http://china-zub.ru/userfiles/file/mapatixezavejijipujoj.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+room+apk+dataPDF 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_off0000b698.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB698	16552 bytes
SHA-256: `670a543b4bd5fc7e808229a01efb6b6326b5510da5dbe97ab4ac6739bc61759f`
`font_01_sfnt_off0000e164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE164	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f97b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF97B	10300 bytes
SHA-256: `f43e0e7e454eb6baef72b15e329d51ecc4e29124ed66d4c9f30a383bb8674fb6`

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