PDF malware analysis — malicious · d29d8480eb0f1b15

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 12:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: ef1cefc32d5408adcbfe0fdae59b6470 SHA-1: 771bcb337b04b96840f6ad84bb07897ae60117db SHA-256: d29d8480eb0f1b1589666779310c15afa94b555d746ab14da8e45237c3db80ca

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, as suggested by the 'PDF_URI' heuristic and the numerous external URLs found, which are often used in phishing campaigns or to download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://giasuthienphuc.com/Images_upload/files/semidakobawiwewikutega.pdf In PDF document text
- http://lovesenergy.nl/file/kuvebasekus.pdfIn PDF document text
- http://playbabydoll.com/userfiles/file/wipasubuzexeta.pdfIn PDF document text
- http://siddharpeedam.org/userfiles/file/In PDF document text
- https://autosaloncenter.com/uploads/file/86594770921.pdfIn PDF document text
- http://preciz.com/uploads/wysiwyg/files/10584737091.pdfIn PDF document text
- http://colegiosantarosa.com/uploads/imagem/file/natufevotumil.pdfIn PDF document text
- http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/zojitaxowagizalekefilozig.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139995aa0ead---zimogalunatasixulewes.pdfIn PDF document text
- http://flightshop.jp/images/blog/file/57420558137.pdfIn PDF document text
- https://aristi-trap.com/upload/users/files/movajebefaxapaxafo.pdfIn PDF document text
- https://ntct-dz.com/ckfinder/userfiles/files/23199700062.pdfIn PDF document text
- https://ivanda-commerce.hr/userfiles/file/79205494559.pdfIn PDF document text
- http://www.yoko-ono.be/images/userfiles/file/58369670586.pdfIn PDF document text
- http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/jigurexomafulagadato.pdfIn PDF document text
- http://fusen-es.info/yamituki-n/uploads/files/73173957918.pdfIn PDF document text
- https://weborder.cloud/userfiles/file///bixupebujo.pdfIn PDF document text
- https://myphi.biz/nbloom/fckuploads/file/kitukipajedakokafuverikux.pdfIn PDF document text
- http://toroisg.com/public/images/files/73648695444.pdfIn PDF document text
- http://bygreenpure.com/userfiles/file/kodejawomogemekapokom.pdfIn PDF document text
- http://usarsenal.it/userfiles/files/juwevavajaperetiraz.pdfIn PDF document text
- http://client.diffuse.info/files/39920915491.pdfIn PDF document text
- http://osoboebludo.com/ckfinder/userfiles/files/3854439243.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f843d57d03---zukowufewagotenofenuja.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pvz+2+eclise+apkPDF 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_off0000cc94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC94	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e4a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A6	18076 bytes
SHA-256: `022bf3d47addae1c5b5ec0a6dfc0d9f4039140a423e0ed82b2cce57571ed80b9`
`font_02_sfnt_off0001140f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1140F	10284 bytes
SHA-256: `5b24edf50d374a3f4f449e1658a4112ac54bf5077c8276006e87a915f77107c2`

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