PDF malware analysis — malicious · 732ef502d1f1f35f

MALICIOUS

PDF

71.3 KB Created: 2021-09-29 02:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d008469c8a5ac021e8852ad0605022c6 SHA-1: c524f4675222c2986822439c9cb35ebf5ebbb78a SHA-256: 732ef502d1f1f35ff12b8ae9c2af92119ba6c236c22d2a3204ec717940d11d0b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to disposable domains or are structured as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

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 http://sys-svinding.dk/userfiles/file/dobozidofavafaxemusijaz.pdf In PDF document text
- http://mikomisushi.com/uploads/files/48447073728.pdfIn PDF document text
- http://parilka.by/var/upload/file/vijoxolo.pdfIn PDF document text
- http://4x4autok.hu/userfiles/files/dupivupumopa.pdfIn PDF document text
- https://elegune.net/files/galeria/files/xilenulalos.pdfIn PDF document text
- https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/dozibinebugugorigekaxob.pdfIn PDF document text
- http://sdes.in/uploads/jipofunibiga.pdfIn PDF document text
- http://panel2conso.com/userfiles/file/nutenevakafozuvafi.pdfIn PDF document text
- http://www.agot.pl/upload/file/39204962959.pdfIn PDF document text
- http://jingkangchem.com/upload/files/gedojaxom.pdfIn PDF document text
- http://diversecityuk.com/userfiles/file/67470189219.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614959f56ee72---bamusabawuluvewamu.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/bazozatudirure.pdfIn PDF document text
- https://chambres-hotes-aube-bleue.fr/userfiles/file/34670588781.pdfIn PDF document text
- http://castel.lu/userfiles/files/kofewiwenixoruse.pdfIn PDF document text
- http://bxbrdh.marketsearching.com/upload/files/14023034342.pdfIn PDF document text
- https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/15594360852.pdfIn PDF document text
- https://actsonics.com/uploads/files/202109041943311677.pdfIn PDF document text
- https://tallerescarrion.com/uploads/file/pixotefepigedotam.pdfIn PDF document text
- http://aytekinpolatel.com/image/files/tilanesopebokogiti.pdfIn PDF document text
- http://jn-zhsc.com/upload/21338879158.pdfIn PDF document text
- https://mogilew.ru/userfiles/file/buboponimejalipaluzame.pdfIn PDF document text
- http://panda-es.tokyo/yamituki-n/uploads/files/nebiwiwibovuvelirodekizug.pdfIn PDF document text
- http://cardealer-space.com/js/upload/files/desotalejin.pdfIn PDF document text
- http://usefchina.com/uploadfile/file///2021090717102545.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=watch+all+stars+2+online+freePDF 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_off0000b480.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB480	10548 bytes
SHA-256: `89025daab80b1722f97cfbd0b970c8d5caa61098c8ce19348dcc59f005229730`
`font_01_sfnt_off0000cc97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC97	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e4a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A9	16632 bytes
SHA-256: `8ede4140f39001b82445e9cc6882b1e2a5d2113cb2c9c373a722019c062aab27`

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