PDF malware analysis — malicious · 9d5c0a6967f47f34

MALICIOUS

PDF

85.7 KB Created: 2021-09-23 05:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0e9af9a0ba34cfbcf4fcb6cb9a57e9cd SHA-1: b1603647e947a3bb4ea86bd47ca95cc847fb9a82 SHA-256: 9d5c0a6967f47f344b0119d6df39f09c6ac26f9aeba2313696e0ef4d6e435be0

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on domains that appear to be part of a link farm, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 5

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.
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://medgal.pl/admin/ckfinder/userfiles/files/31068989743.pdf In PDF document text
- https://www.jaegeraviation.com/ckfinder/userfiles/files/mokonijobipidi.pdfIn PDF document text
- https://ventadeterrenosagricolas.com/userfiles/file/8286205741.pdfIn PDF document text
- https://huanghecables.com/d/files/wagazavozugovutowiboze.pdfIn PDF document text
- http://bushurov.ru/images/files/63111952459.pdfIn PDF document text
- http://pusancard.com/userData/board/file/61467602596.pdfIn PDF document text
- https://0900107678.com/upload/file/wesasepovikenaburese.pdfIn PDF document text
- http://xinchenfast.com/upload/file/34780632905.pdfIn PDF document text
- http://canadianrockies.ca/files/file/gijov.pdfIn PDF document text
- http://colafranceschi.it/userfiles/files/xawewudazutivu.pdfIn PDF document text
- https://rocksoliddesigns.biz/userfiles/file/8772349411.pdfIn PDF document text
- http://elskup.pl/images/assets/file/32401489882.pdfIn PDF document text
- https://eastmangroup.org/ckfinder/userfiles/files/41121904769.pdfIn PDF document text
- http://0vote.com/ckfinder/files/wuzafamipeputudegevadofe.pdfIn PDF document text
- https://semangkamerah.com/contents/files/20855467767.pdfIn PDF document text
- http://cnex.cc/images/blog/file/18158919430.pdfIn PDF document text
- http://jinshi66.com/uploadfiles/files/batilavilitinidiwa.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131b0554f368---jitiguboveripuketuw.pdfIn PDF document text
- http://naturallabs.de/userfiles/file/muwodikegaduzajositizum.pdfIn PDF document text
- https://aathichudi.org/userfiles/file/62893530857.pdfIn PDF document text
- https://nedimgame.com/calisma2/files/uploads/63830524791.pdfIn PDF document text
- http://koreadramatour.com/FileData/ckfinder/files/20210909_50146A333B29D024.pdfIn PDF document text
- http://www.dereformasenalicante.com/archivos/files/62941367217.pdfIn PDF document text
- http://auto-spec.ca/fck/file/puzopelufon.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=my+hero+rising+heroesPDF 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_off0000e18e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE18E	21652 bytes
SHA-256: `5eaea971af0a7653b37db48d0f79b9ec8e7c559a2d70924400d6949ccb45fd50`
`font_01_sfnt_off00011a97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A97	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000132ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132AE	10188 bytes
SHA-256: `4df44b8f4334e8147656a4b8c49978ac73d14c72b35253d54825e5326b54bbae`

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