PDF malware analysis — malicious · 7bceb0a66cda1ceb

MALICIOUS

PDF

94.1 KB Created: 2021-09-10 05:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 154cf9aaf3b4e3f20a47d08ef8344316 SHA-1: 4d03e1a29b7cae626bb6d24c1dc2ddad6c1ec9e1 SHA-256: 7bceb0a66cda1cebef5a1e5866494179e68fc7223f58aca7f7eb16c6202e54dc

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and numerous extracted URLs suggest a phishing or scam attempt, likely to trick users into visiting malicious sites or downloading further malware. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

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://newshop.jp/archive/file/37330343548.pdf In PDF document text
- https://fix2go.info/userfiles/file/17133447688.pdfIn PDF document text
- https://icon-studios.com/userfiles/file/nodaxerijagunavod.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613341d75dbb8---zaxorewu.pdfIn PDF document text
- http://bygreenpure.com/userfiles/file/xitudodebaweratevol.pdfIn PDF document text
- http://come2menorca.com/images/file/25319791291.pdfIn PDF document text
- https://togelunited4d.com/contents/files/75750520916.pdfIn PDF document text
- https://leganordavigliana.com/uploads/file/93416157847.pdfIn PDF document text
- http://agriturismocorteerbatici.it/userfiles/files/28484464130.pdfIn PDF document text
- https://soyana.de/js/ckfinder/userfiles/files/kilejulixofasuburawamup.pdfIn PDF document text
- http://onestep-tokyo.com/userfiles/file/76771783856.pdfIn PDF document text
- http://uhorder.com/upload/files/54054791408.pdfIn PDF document text
- http://kraemer-duennebacke.de/files/file/8193769490.pdfIn PDF document text
- http://ip-malkov.ru/uploads/files/lubekiforovodinovazise.pdfIn PDF document text
- http://consoles-a-gagner.com/fckeditor/userfiles/file/rixovogig.pdfIn PDF document text
- http://fapannimario.it/userfiles/files/60094389071.pdfIn PDF document text
- http://yourmoneyyourbank.com/uploads/File/tubizumezaxuposexuji.pdfIn PDF document text
- http://manchetenewsms.com.br/ckfinder/userfiles/files/18514790731.pdfIn PDF document text
- https://ice-group.pl/userfiles/file/nojopuxoxosokazusu.pdfIn PDF document text
- https://myclubowners.travelenvogue.com/userfiles/files/kajugipuguvonuxebisapewo.pdfIn PDF document text
- https://swift-tw.com/lcc/upload/files/75298376072.pdfIn PDF document text
- http://shriramashramssschool.org/userfiles/file/59499686005.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ade69c38e---92479957469.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=android+aktualizacja+systemu+tylko+przez+wifiPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF16	11344 bytes
SHA-256: `76fee3871af7ca00cb82d065fa445af47af8b4d772d1be4b89bf536b86854c90`
`font_01_sfnt_off000109df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109DF	18832 bytes
SHA-256: `faa87ffb7072ed8f29b8cd9db732f5b48bd4828430f1ebdf3edad3a4703aabaa`
`font_02_sfnt_off00013a37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A37	16312 bytes
SHA-256: `7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae`
`font_03_sfnt_off00015042.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15042	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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