PDF malware analysis — malicious · df33d001ac737262

MALICIOUS

PDF

78.7 KB Created: 2021-09-12 23:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 7d231ee4769d2f4b8419ec97c32c2a25 SHA-1: e324679e1b14aa109df4eb83dec1fa6f9c95d994 SHA-256: df33d001ac7372628066de5606b7a697be5fed43e7e2002f445f12b111d72b87

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

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 https://mokshadhamnepal.org/userfiles/files/82817316403.pdf In PDF document text
- http://apartament-krokus.pl/userfiles/file/javewidovedogexadodabide.pdfIn PDF document text
- http://jeanthompson.nl/ckfinder/userfiles/files/43220912766.pdfIn PDF document text
- https://nepalmicrofinancesummit.org/userfiles/files/86197966642.pdfIn PDF document text
- http://tuzvedo.hu/elemek/file/71965802357.pdfIn PDF document text
- http://jamesandsons.ca/userfiles/file/64723182209.pdfIn PDF document text
- http://dispensapertutti.com/userfiles/files/jusuripine.pdfIn PDF document text
- http://blow-w124.com/js/upload/files/jorozexeribivolez.pdfIn PDF document text
- https://khanikango.in/file/92050237644.pdfIn PDF document text
- http://quick-thailand.com/images/uploads/file/wekitas.pdfIn PDF document text
- http://gearcon-eng.com/file_media/file_image/file/xikaxirosomewivop.pdfIn PDF document text
- https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/80352892509.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccefbd4a3f---89193370234.pdfIn PDF document text
- http://booklandbooks.com/userfiles/file/88436924794.pdfIn PDF document text
- https://greenfuturevietnam.com/Upload/files/2997861309.pdfIn PDF document text
- https://fullgame.hu/uploads/files/35492196072.pdfIn PDF document text
- https://coopinproject.eu/ckfinder/userfiles/files/rusenavolepaxesur.pdfIn PDF document text
- http://schokoladenfontaene.de/idata/47379516221.pdfIn PDF document text
- http://ugrctrani.it/userfiles/files/nerovomi.pdfIn PDF document text
- http://bkm-market.net/userfiles/file/xujaripagimijafute.pdfIn PDF document text
- http://eska-lift.ru/userfiles/file/xejibinumubusodusi.pdfIn PDF document text
- http://yogaschoolofkerala.com/photos/editor/files/4658806670.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139da71489f4---betewiragukik.pdfIn PDF document text
- https://iqrainternationalschool.org/_assets/files/62990817501.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=android+10+connect+to+wifi+programmaticallyPDF 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_off0000ceac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEAC	11148 bytes
SHA-256: `0518e0240887e2dd6c9981d1a4876c18c352455301494096295845a5e9a1263e`
`font_01_sfnt_off0000e897.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE897	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000100a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100A9	17244 bytes
SHA-256: `3c4ce723006041baef956fab681cdcdf46a8c4650f831c8e0c853abecb358212`

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