PDF malware analysis — malicious · 4f710f84e4e01c86

MALICIOUS

PDF

79.2 KB Created: 2021-09-17 09:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 7d053724c8513c8450122bd93611cd45 SHA-1: be075ef82f88c7540131fb267bcb6215f38569ce SHA-256: 4f710f84e4e01c864c1ca33435be4ea0b8e3c9e6cef32807bacfd8e111b2ee33

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic strongly suggests the document instructs users to copy and paste commands into a shell, a common tactic for executing secondary payloads. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://oniceh.ru/uplcv?utm_term=convert+ogg+to+mp4 PDF link annotation
- http://baiduvpn.com/upload/files/33966450971.pdfIn PDF document text
- http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/50217998805.pdfIn PDF document text
- http://perfect-gallery.com/userfiles/file/73713331899.pdfIn PDF document text
- http://studionegro.net/userfiles/files/43253695043.pdfIn PDF document text
- https://bisleriwheel.genefied.co/ckfinder/userfiles/files/93807434642.pdfIn PDF document text
- http://topnotchimports.com/ckfinder/userfiles/files/1028908853.pdfIn PDF document text
- http://www.kotolantopeni.cz/files/94183152417.pdfIn PDF document text
- http://futimisdev.com/userfiles/file/12090566128.pdfIn PDF document text
- http://oresteruggiero.com/userfiles/files/50175859595.pdfIn PDF document text
- http://educasters.co/ckfinder/userfiles/files/52571730571.pdfIn PDF document text
- https://kitapkaplama.com/upload/ckfinder/files/zolomalulegogifapevopup.pdfIn PDF document text
- http://petukmahaaaraj.com/userfiles/file/zenoz.pdfIn PDF document text
- https://comtraining.cl/userfiles/files/87791685888.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/14896593806.pdfIn PDF document text
- http://ancheng-medical.com/uploadfile/files/68036271205.pdfIn PDF document text
- http://fine-trading-knotwork.de/uploads/media/gavividowujepo.pdfIn PDF document text
- https://pactforfamilies.org/ckfinder/userfiles/files/90534034033.pdfIn PDF document text
- https://snqrsl.quebec/upload/editor/file/kopikawufu.pdfIn PDF document text
- http://degrossier.nl/uploads/file/midunuzaxuweworogawimago.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e270e69d09df1efe8569860a9d83b45b/zesobifevo.pdfIn PDF document text
- https://kurtoglumob.com/upload/file/38996858853.pdfIn PDF document text
- http://dokturmice.com/ckfinder/userfiles/files/84235534505.pdfIn PDF document text
- https://ls-machinery.com/uploadpic/files/202109152158275711.pdfIn PDF document text
- https://raselapp.com/userfiles/file/kuwabevezususutoj.pdfIn PDF document text
- http://club-integra.ru/userfiles/file/67611266352.pdfIn PDF document text
- 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_off0000d3f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3F0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ec07.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC07	10300 bytes
SHA-256: `77bd5e097a4ec198b516b6f295266dab861a01913f69ee9ef7c86bc47397a36b`
`font_02_sfnt_off0001034d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1034D	17092 bytes
SHA-256: `193fb74500fa9da6a10eed2125b89ea5d8794661b0e9b2b477f33e1ff95e51e8`

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